又是由年幼到現在也想不通的科學問題,小學時自然科學教導我們閃電是由於空氣在受熱澎漲而急速上升時,因為激烈的撞擊而失去或多得了電子,累積在雲中,當遇到相反電荷的或當電動勢超過一定量就可以令不遠的物件產生相反的電場,因而放電,多餘電子重新來到欠缺電子的原子。只是我有兩個問題一直解決不了:
1. 因為激烈的撞擊而失去或多得了電子的水份已經不可以稱為水份子,化學性質應有所不同;
2. 因為激烈的撞擊而失去或多得了電子的水份子本身已有了靜電場,當然最直接的就是吸引空氣中帶相反電荷的離子而放電中和一番,何以非要累積在不帶電的雲不可?
3. 一雲如果是中和的被因為激烈的撞擊而失去或多得了電子的水份子吸附也算合理,但是隨箸依附的帶電水份子愈來愈多,則其他的帶電水份子要依附在這片雲所需的動能愈來愈高,它的動能來自哪裏?
4. 另外,隨箸依附在雲中的帶電水份子愈來愈多,靜電力的同性相斥作用力怎不會比靠氫鍵來接合的不帶電水份子的結合力更強,何以雲能夠累積如此多的帶電水份子而不被撕裂成一小片?
2009年7月23日 星期四
靜電的疑惑(1)
小學時人人都學過什麼叫摩擦生電,理論是當劇烈摩擦時,其中一方的原子的電子被撞離了軌道,於是形成了兩方都是電子和質子數量不相等,結果產生靜電。我一直以來不明白的是,如果真的是一方把另外一方的電子撞離軌道,除非它被空氣中的原子吸收,否則這粒脫軌電子最方便的去處就是另一方的表面,所以理論上應是一方的電子比質子數量多,而另一方就自然電子比質子數量小,由此推導出一方應是正極而另一方是負極,因而兩物件相互吸引。但是我的印象告訴我,似乎實驗出來的結果就是兩物件相互排斥,即兩方面都是同時電子比質子數量小或電子比質子數量多,這麼多餘的電子豈不是無中生有或者無端端消失了嗎?
所以﹐我提議用科學實驗去分辦兩個假說,就是到底兩物件劇烈摩擦生產/毀滅電子而產生靜電現象,還是兩物件劇烈摩擦時的電子被空氣原子吸收而產生靜電現象。我想到的方法是用吸塵機遲遲抽掉一玻璃箱之空氣,在不同的氣壓把兩物件用相同的力量摩擦,看看產生出來的靜電有沒有什麼不同﹐理論上,如果我的假說有根據﹐則隨箸真空的程度愈高﹐靜電量愈來愈少。
所以﹐我提議用科學實驗去分辦兩個假說,就是到底兩物件劇烈摩擦生產/毀滅電子而產生靜電現象,還是兩物件劇烈摩擦時的電子被空氣原子吸收而產生靜電現象。我想到的方法是用吸塵機遲遲抽掉一玻璃箱之空氣,在不同的氣壓把兩物件用相同的力量摩擦,看看產生出來的靜電有沒有什麼不同﹐理論上,如果我的假說有根據﹐則隨箸真空的程度愈高﹐靜電量愈來愈少。
標籤:
物理學,
物理學假說,
科學,
科學實驗,
靜電學,
electrostatic field,
fringe science,
hypothesis,
Physics
如何去拆散一粒電子?
這篇文章提到的科學原理其實和上一篇相差不遠,既然可以用快速的電磁場變化來把原子最外層的電子拆走,要是我們用此方法在一粒電子上,則同理電子會感應電磁場而自轉,當電磁場快速的由一極變化到相反的一極時,我們就可以不用超長的圓形軌道就可以做電子內部結構的研究,當然先決條件是可以把電子由原子中拆出來,然後再以此方法處理。當然亦要用到我的發明。
如何拆散一個原子?
這是朋友發明的自己清潔換水器帶給我的靈感,他以為最清潔的洗衣服方法不是單一方向不停轉而寄望於水流和衣服的磨擦,反而應是一個方向旋轉一會,形成轉動慣性後再向另一方向旋動,如此一來就有兩部的轉心力把污蹟沖走(但不可以用現行的馬達,因為如此會大大縮短它的壽命,要重新設計)。我之前也用英文發表過類似的想法應用在把原子電離化上面,因為電子是以一定的軌跡繞着核心轉動,而和電子轉動的方向的平均累加形成了原子的磁場,因此如果用強大的電磁場先引導所有電子向一個方向旋轉,然後忽然用另一個相反的電磁場先引導所有電子向相反方向旋轉,於是原子的最外層電子便有可能因為離心力比電子和質子的吸引力還要強而被扯離原子,於是我們便可以很方便的把原子離子化。但關鍵是目前任何的電磁線圈都有一定的電磁慣性,不可即時不單退磁,更可以轉到另一方向,所以就要應用我的新發明了。
地磁的來由假說
這篇是翻譯自己以前寫了兩篇解釋地磁的來由,首先兩篇都是建基於相對論電磁學的根基,就是當兩個物件中的非自由電子在作相對的旋轉運動時,因為以各自的角度去看,對方的旋轉運動是和自己的旋轉方向相反,所以產生了相斥的電磁場,於是在地球上高速轉動的東西就會因此產生了浮力,此事已被實驗證實。只是因為這些停留在原子軌道電子本身也在做旋轉運動,而不是被完全固定,所以相對旋轉運動就不是工整的圓形,於是這個效應就相對較弱。
把這個原理應用在地球上,我的推想是地球核心有不少流動而含鐵離子的岩漿,一層層地繞箸地心轉動,由於液體黏力(viscosity)的緣故,所以最近地心這一層最快,距離地心愈遠就愈慢,所以每一層以地心為軸作旋轉運動的岩漿於轉動得最遲的地表而言都是向相反的方向作旋轉運動,所以層層累積的效應就形成了地磁南北極。
要驗証這假說,只要量度地球磁場強度是如何隨箸與地心距離愈少而減弱﹐是否合乎岩漿流動的相對速度及含鐵量,理論上當然是愈近地心,地磁愈來愈弱;另一個推論就是地磁應和地球自轉的方向有關,想像一個於真空旋轉的液體行星,要是沒有外來的力距,它的最外層會先向一個方向旋轉,慢慢遲下來再向另一方向旋轉,如此類推,但是由於能量守恆,旋轉的角動量必然愈來愈低,所以過往地球應有無數次地磁逆轉及地磁減弱的記錄,即地表剛誕生時應為最強,之後隨箸岩漿冷卻和凝固,相對旋轉運動愈來愈遲,最後完全凝固時失去地磁。
忘了最近寫這篇提出的新証據去證明地磁是和岩漿流動的流動模式有關,因為地球的南北磁極是每年都同步移動的,如果是由固態磁性物體而形成就解釋不了,而用地電的流動也有點牽強,所以我提出的假說最合乎目前已知的事實,只是人類目前的科技不足以驗明或否定我的假說。
把這個原理應用在地球上,我的推想是地球核心有不少流動而含鐵離子的岩漿,一層層地繞箸地心轉動,由於液體黏力(viscosity)的緣故,所以最近地心這一層最快,距離地心愈遠就愈慢,所以每一層以地心為軸作旋轉運動的岩漿於轉動得最遲的地表而言都是向相反的方向作旋轉運動,所以層層累積的效應就形成了地磁南北極。
要驗証這假說,只要量度地球磁場強度是如何隨箸與地心距離愈少而減弱﹐是否合乎岩漿流動的相對速度及含鐵量,理論上當然是愈近地心,地磁愈來愈弱;另一個推論就是地磁應和地球自轉的方向有關,想像一個於真空旋轉的液體行星,要是沒有外來的力距,它的最外層會先向一個方向旋轉,慢慢遲下來再向另一方向旋轉,如此類推,但是由於能量守恆,旋轉的角動量必然愈來愈低,所以過往地球應有無數次地磁逆轉及地磁減弱的記錄,即地表剛誕生時應為最強,之後隨箸岩漿冷卻和凝固,相對旋轉運動愈來愈遲,最後完全凝固時失去地磁。
忘了最近寫這篇提出的新証據去證明地磁是和岩漿流動的流動模式有關,因為地球的南北磁極是每年都同步移動的,如果是由固態磁性物體而形成就解釋不了,而用地電的流動也有點牽強,所以我提出的假說最合乎目前已知的事實,只是人類目前的科技不足以驗明或否定我的假說。
標籤:
地磁,
物理學,
流動力學,
相對論,
假說,
電磁學,
earth's magnetic field,
fluid dynamic,
hypothesis,
Magnetic field,
Physics,
science
2009年6月8日 星期一
2009年6月4日 星期四
Static elevator system?
Last time I introduce a problem of energy efficiency in all elevator, namely that the gravitational potential energy gained by having a balancing weight on the process of elevator going upward is lost on its way back. So I suggests two way to 'resolve' this technicality: First is by making the balancing weight adjustable; Second is to changing how the balancing weight is interacting with the elevator. Needn't me make explicit my design, some intelligent reader may already in the same train of thought as I: To pass the tension generated by the balancing weight, it is not necessary to put the elevator and balancing weight in the same cable.
One we made this conceptual breakthrough, then it follow the logic that we can separate the gravitational force and how that acting on the subject by using a tension transferring system to transfer the tension produce by gravity acting on balancing weight. That system could be as simple as pairing of electromagnet and iron wheel, or more complicate system like magnet and electromagnet using the generator effect. With this system we can now fine tune how the tension produced by the balancing weight affect the cable carrying the elevator, i.e. the timing, quantity and direction of the force.
Suppose we now have this system in place so we turn on and turn off the effect of tension produced by the balancing weight on the cable carrying the elevator. However, we are still one step from using the tension produced by the balancing weight disentangled with the nature gravitational energy because what goes up must goes down. My suggested design is couple the wheel driving the elevator with unidirectional gear and break down the upward/downward motion of it to thousandth. Now imagine when the elevator is going upward,given the balancing weight is ten to hundred times of the expected weight of elevator, then the weight of the elevator is transferred to the balancing weight resulting in minimal downward motion. Suppose we now locked the elevator, turn off the tension transferring system and allow the balancing weight to bounce back using elasticity of the cable or other mechanism. So now the balancing weight is on the same position while the elevator has moved upward.The process is then repeat itself until the elevator reach its uppermost point; and when elevator is going downward, we simply turned off the tension transferring system. Thus we had extract the energy from gravitational field to move the elevator by clever engineering, we could probably saved 70%-80% of the energy cost of the elevator.
One we made this conceptual breakthrough, then it follow the logic that we can separate the gravitational force and how that acting on the subject by using a tension transferring system to transfer the tension produce by gravity acting on balancing weight. That system could be as simple as pairing of electromagnet and iron wheel, or more complicate system like magnet and electromagnet using the generator effect. With this system we can now fine tune how the tension produced by the balancing weight affect the cable carrying the elevator, i.e. the timing, quantity and direction of the force.
Suppose we now have this system in place so we turn on and turn off the effect of tension produced by the balancing weight on the cable carrying the elevator. However, we are still one step from using the tension produced by the balancing weight disentangled with the nature gravitational energy because what goes up must goes down. My suggested design is couple the wheel driving the elevator with unidirectional gear and break down the upward/downward motion of it to thousandth. Now imagine when the elevator is going upward,given the balancing weight is ten to hundred times of the expected weight of elevator, then the weight of the elevator is transferred to the balancing weight resulting in minimal downward motion. Suppose we now locked the elevator, turn off the tension transferring system and allow the balancing weight to bounce back using elasticity of the cable or other mechanism. So now the balancing weight is on the same position while the elevator has moved upward.The process is then repeat itself until the elevator reach its uppermost point; and when elevator is going downward, we simply turned off the tension transferring system. Thus we had extract the energy from gravitational field to move the elevator by clever engineering, we could probably saved 70%-80% of the energy cost of the elevator.
標籤:
升降機,
主意,
物理發明,
科學,
重力能,
conceptual invention,
energy from gravity,
Idea,
Physics,
science idea
2009年6月1日 星期一
靜態重力電梯主意(2)
上次提到,要盡量利用平衡重的重量為電梯上升的動力,但又不想在電梯下降時付回剛賺到重力位能,除了把平衡重的重量改成可變的思路外,還有一個改變平衡重和電梯如何互動的思路,此思路如何具體實現?
首先,一般的設計都是把平衡重和電梯直接連在一起,以便平衡重的重量和電梯的重量直接互動,其實要平衡重的重量可以和電梯的重量發生作用,兩者不一定直接連起來,只要有適當的方法把平衡重的重量傳過去,有這樣一個媒介的好處是我們可以控制兩者的重力如何互動,其中一個媒介/方法是利用發電機發電時產生的阻力效應來把平衡重的重量在有需要時傳到電梯,而當沒有需要時,這個重力傳遞系統可以關掉。但是,雖然可以控制重力的傳遞,卻無法克服最基本的一個問題,就是除非平衡重可以像上次水力升降機的設計一樣可升可降,否則下降了的平衡重一樣要同樣的位能來補償,除非有一個辨法令平衡重不用升降也可以發揮它的重力作用,於是靜態(或相對靜態)的平衡重居然用自身的重量可以令電梯升降。
我的想法是把電梯上升及下降時的動作分成萬千個分割的片段,假設平衡重是比電梯重近百部,如此當電梯要上升時,我們可以用重力傳遞系統把平衡重的重力間竭傳送到電梯上,電梯每上升一格後便被不可逆的齒輪卡住,而由電梯上升而產生的反作用力則會令平衡重有一剎那的躍動,但不久便會回複正常的位置。如此的過程不斷重複,直至電梯抵達最高層為止。而當電梯向下降時,運作方式就更簡單了,只要電梯的鋼纜夠長,我們要可以在此時令重力傳遞系統暫時失效,於是平衡重的重量為電梯上升提供的動能便不用任何方式來補償,達到充份利用地球重力場所提供的勢能的效果,節省能源自然是最環保。
首先,一般的設計都是把平衡重和電梯直接連在一起,以便平衡重的重量和電梯的重量直接互動,其實要平衡重的重量可以和電梯的重量發生作用,兩者不一定直接連起來,只要有適當的方法把平衡重的重量傳過去,有這樣一個媒介的好處是我們可以控制兩者的重力如何互動,其中一個媒介/方法是利用發電機發電時產生的阻力效應來把平衡重的重量在有需要時傳到電梯,而當沒有需要時,這個重力傳遞系統可以關掉。但是,雖然可以控制重力的傳遞,卻無法克服最基本的一個問題,就是除非平衡重可以像上次水力升降機的設計一樣可升可降,否則下降了的平衡重一樣要同樣的位能來補償,除非有一個辨法令平衡重不用升降也可以發揮它的重力作用,於是靜態(或相對靜態)的平衡重居然用自身的重量可以令電梯升降。
我的想法是把電梯上升及下降時的動作分成萬千個分割的片段,假設平衡重是比電梯重近百部,如此當電梯要上升時,我們可以用重力傳遞系統把平衡重的重力間竭傳送到電梯上,電梯每上升一格後便被不可逆的齒輪卡住,而由電梯上升而產生的反作用力則會令平衡重有一剎那的躍動,但不久便會回複正常的位置。如此的過程不斷重複,直至電梯抵達最高層為止。而當電梯向下降時,運作方式就更簡單了,只要電梯的鋼纜夠長,我們要可以在此時令重力傳遞系統暫時失效,於是平衡重的重量為電梯上升提供的動能便不用任何方式來補償,達到充份利用地球重力場所提供的勢能的效果,節省能源自然是最環保。
標籤:
升降機,
主意,
物理發明,
科學,
重力能,
conceptual invention,
energy from gravity,
Idea,
Physics,
science idea
2009年5月31日 星期日
My idea of hydrallic driven elavator
Now it is trendy to invent energy saving items, so I design this new elavator for solve the age old dilemma of balancing weight. The idea behind balancing weight is to increase the easiness of lifting an elavtor, at the price of paying back the same amount of potential energy it saved on its upward motion. Is there a way to save energy on upward motion without compensate in the downward motion?
There are several ways to approach this problem: First, we can made the weight of balancing weight variable in according to the direction of motion for the goal of energy saving; Second is to change the way which these two interact with each other. I save the later for another article. Now, how to change the weight of balancing weight so it would be heaviest when the elevator is going up and lightest when the elevator is going down?
Easy, by using the waste water pump out of each level; we now need a collection facilitate for collecting all the waste water from each apartment of each level; and also not a very complicate system to intelligently decide the amount of waste water used during each passage of elevator. Assume such a system is in place, then the balancing weight is actually a metallic cylinder allowing waste water to be collected. When the elevator is travelling upward, the rule of thumb is to increase the balancing weight as much as possible; and when the elevator is going back, the waste water in the cylinder is expelled through its opening in the bottom, which then going to the public sewage processing system.
How would such an idea to be implemented?
There are several ways to approach this problem: First, we can made the weight of balancing weight variable in according to the direction of motion for the goal of energy saving; Second is to change the way which these two interact with each other. I save the later for another article. Now, how to change the weight of balancing weight so it would be heaviest when the elevator is going up and lightest when the elevator is going down?
Easy, by using the waste water pump out of each level; we now need a collection facilitate for collecting all the waste water from each apartment of each level; and also not a very complicate system to intelligently decide the amount of waste water used during each passage of elevator. Assume such a system is in place, then the balancing weight is actually a metallic cylinder allowing waste water to be collected. When the elevator is travelling upward, the rule of thumb is to increase the balancing weight as much as possible; and when the elevator is going back, the waste water in the cylinder is expelled through its opening in the bottom, which then going to the public sewage processing system.
How would such an idea to be implemented?
標籤:
升降機,
主意,
物理發明,
科學,
重力能,
conceptual invention,
energy from gravity,
Idea,
Physics,
science idea
2009年5月21日 星期四
水力升降機小主意
環保潮流,萬事萬物都以節能為尚,但是現在的升降機一點都不服膺於這原則,因為聰明的工程師為了省回升降機上升時的能量,於是便加上了平衡重來作相反方向的運動,不過省回的能量卻在升降機下降時被浪費掉。關鍵是有升必有降,只要平衡重的重量不變,節能是絕對不可能的。
有幾個可以解決此難題的思路,一是由平衡重如何和升降機的重量互動箸手,另一是相當簡單的把平衡重的重量由不變改成可變,順騰摸瓜,要節能的話當然是想辦法令升降機在上升時的平衡重變成最重,同理,升降機在下降時的平衡重變成最輕。如何令升降機在上升時的平衡重變成最重,升降機在下降時的平衡重變成最輕呢?其中一個辦法是先把平衡重變成一大容器,然後利用每戶每天生產出來的污水,每當升降機要向上時,就把平衡容器注滿污水,然後當升降機要下降時,就把平衡容器盛的水放走到污水渠,如此我們是巧妙利用了污水的重力勢能作能源來推動升降機作升降任務,它本身只消秏少量的電來作通風和照明(可從太陽能取得),絕對合乎環保的原則,如果全世界都使用的話,每年將減低數以千噸溫室氣體的排放。剩下唯一的技術難關,是如何有效控制污水的收集及排放,而污水收集又如何儲藏才能避免衛生問題?要是污水不足的話,在雨帶地方可收集雨水作同一用途。
此發明應用了蔣振寧抽取地心吸力的原理,本人為開發群組其中一成員,願意和任何人(除了曾拿我主意去註冊專利的他)合作開發!
有幾個可以解決此難題的思路,一是由平衡重如何和升降機的重量互動箸手,另一是相當簡單的把平衡重的重量由不變改成可變,順騰摸瓜,要節能的話當然是想辦法令升降機在上升時的平衡重變成最重,同理,升降機在下降時的平衡重變成最輕。如何令升降機在上升時的平衡重變成最重,升降機在下降時的平衡重變成最輕呢?其中一個辦法是先把平衡重變成一大容器,然後利用每戶每天生產出來的污水,每當升降機要向上時,就把平衡容器注滿污水,然後當升降機要下降時,就把平衡容器盛的水放走到污水渠,如此我們是巧妙利用了污水的重力勢能作能源來推動升降機作升降任務,它本身只消秏少量的電來作通風和照明(可從太陽能取得),絕對合乎環保的原則,如果全世界都使用的話,每年將減低數以千噸溫室氣體的排放。剩下唯一的技術難關,是如何有效控制污水的收集及排放,而污水收集又如何儲藏才能避免衛生問題?要是污水不足的話,在雨帶地方可收集雨水作同一用途。
此發明應用了蔣振寧抽取地心吸力的原理,本人為開發群組其中一成員,願意和任何人(除了曾拿我主意去註冊專利的他)合作開發!
標籤:
升降機,
主意,
物理發明,
科學,
重力能,
conceptual invention,
energy from gravity,
Idea,
Physics,
science idea
2009年5月1日 星期五
熱力傳導受不受地心吸力的影響?
當然受地心吸力的影響:
比較以下3個例子,
1.半杯熱水在底,半杯冷水添在面;
2.半杯冷水在底,半杯熱水添在面;
3.半杯熱水添在左,半杯冷水添在右;
時間由快至慢排列:1,3,2.
何解1快過2?
因為在冷水較重,熱水較輕,所以當冷水放在底而熱水放在面時,受地心吸力的作用,熱冷水都傾向保留自己的位置;但是當當冷水放在面而熱水放在底時,受地心吸力的作用,熱水向上流,冷水向下流,因此地心吸力協助了形成對流,方便熱傳導。
水的分別或者會較少,因為水的比熱容較大,但是用比熱容較少的流體分別會更明顯,而地心吸力亦是氣流動力的一部份。
比較以下3個例子,
1.半杯熱水在底,半杯冷水添在面;
2.半杯冷水在底,半杯熱水添在面;
3.半杯熱水添在左,半杯冷水添在右;
時間由快至慢排列:1,3,2.
何解1快過2?
因為在冷水較重,熱水較輕,所以當冷水放在底而熱水放在面時,受地心吸力的作用,熱冷水都傾向保留自己的位置;但是當當冷水放在面而熱水放在底時,受地心吸力的作用,熱水向上流,冷水向下流,因此地心吸力協助了形成對流,方便熱傳導。
水的分別或者會較少,因為水的比熱容較大,但是用比熱容較少的流體分別會更明顯,而地心吸力亦是氣流動力的一部份。
2008年11月10日 星期一
How to make a rope that won't swing by strong wind?
With a rope by itself, it would be impossible to do so. To make something unaffected by a strong force in anything, there are two directions to go:
A. When the force is absorbed and transformed into thermal energy, i.e. the uniqueness of directionality of the external force is destroyed by the internal structure of the rope;
B. When we could use the force to turn against itself, i.e. when we can led the force to interact with the rope to achieve a self-contradiction, then logically and physically the force can achieve nothing.
Since A has been discussed throughly in any ordinary level material Physics textbook, so I am more interested in discussing B. To produce a self contradiction, a rope by itself is not suffice to do so. We need two columns that is fixated on the group; then we make a knot on one side column, and we fix the rope from left side of one column to right side of another column so it pass each location only once.
Now when wind hit the rope in any direction, it would attempt to extend the part of the rope that is nearer to the source of wind. So because of this construction, when it attempt to extend the rope on one side then the other side would react by contract (since the rope has limited extensibility.) However, because the two parts are parallel to each other(and perpendicular to the direction of wind), then the force goes into extending the part of the rope closer to the source of wind also attempted to extend the part of the rope that is further from the source of wind. Therefore, through this construction, the force of wind is led to acting against itself in the rope, thus however the strength of the wind, the rope will never swing.
Can we extend this idea into areas other than Physics?
A. When the force is absorbed and transformed into thermal energy, i.e. the uniqueness of directionality of the external force is destroyed by the internal structure of the rope;
B. When we could use the force to turn against itself, i.e. when we can led the force to interact with the rope to achieve a self-contradiction, then logically and physically the force can achieve nothing.
Since A has been discussed throughly in any ordinary level material Physics textbook, so I am more interested in discussing B. To produce a self contradiction, a rope by itself is not suffice to do so. We need two columns that is fixated on the group; then we make a knot on one side column, and we fix the rope from left side of one column to right side of another column so it pass each location only once.
Now when wind hit the rope in any direction, it would attempt to extend the part of the rope that is nearer to the source of wind. So because of this construction, when it attempt to extend the rope on one side then the other side would react by contract (since the rope has limited extensibility.) However, because the two parts are parallel to each other(and perpendicular to the direction of wind), then the force goes into extending the part of the rope closer to the source of wind also attempted to extend the part of the rope that is further from the source of wind. Therefore, through this construction, the force of wind is led to acting against itself in the rope, thus however the strength of the wind, the rope will never swing.
Can we extend this idea into areas other than Physics?
2008年9月5日 星期五
Why Euler's Coil must have 4 coils as minimum?
That is for two ‘waves’ from the source electromagnetic coil to be merge in each electromagnetic coils, which may produce an effect similar to that of Parallel Path Effect.
2008年8月23日 星期六
2008年8月22日 星期五
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