什么？杯子倒立了，杯子里的水却不会漏出来？
what? The cup is upside down, but the water in the cup won't leak out?
正所谓亲身下河知深浅，亲口尝梨知酸甜，事不宜迟，我现在就来做这个小实验。
As the saying goes, one can know the depth of a river by going down and the sweetness and sourness of a pear by tasting it with one's own mouth. Without delay, I will conduct this small experiment now.
我准备好了实验要用的材料：一个纸杯，一张硬一点的纸，和一些水。怀着激动的心情，我开始了试验。我先把水放进纸杯里，纸杯装得满满的，好像马上就要溢出来了；接着我小心地把纸盖上去，轻轻压了压；然后我的两只手互相配合着把纸杯翻了过来。出处 wWW.zuOWeNBa.nEt
I have prepared the materials for the experiment: a paper cup, a harder piece of paper, and some water. With excitement in my heart, I began the experiment. I first put water into the paper cup, which was filled to the brim as if it was about to overflow; Then I carefully covered the paper and gently pressed it down; Then my two hands cooperated with each other to flip the paper cup over.
我的心七上八下的，心想水不会漏出来吧？
My heart is beating up and down, thinking to myself, won't the water leak out?
这么想着我的手又不由自主地把纸往下按了按，突然一些水漏了出来，我的心紧张到了极点。然后，我慢慢把手松开。水居然真的没有倒出来呢。
With this thought in mind, my hand involuntarily pressed down on the paper, and suddenly some water leaked out, making my heart extremely nervous. Then, I slowly released my hand. The water didn't really pour out.
我既开心又不解，水为什么没有从纸杯里漏出来呢？查阅了相关资料，我终于明白了其中的原理。杯子倒立不漏水是利用了物理学中压强的原理。当杯子装满水并倒立时，纸把空气给隔绝了，水和纸张亲密接触，这时大气就会对纸张施压，所以杯子倒立不会漏水。
I am both happy and puzzled, why didn't the water leak out of the paper cup? After consulting relevant materials, I finally understood the principle behind it. The inverted cup that does not leak water utilizes the principle of pressure in physics. When the cup is filled with water and inverted, the paper isolates the air, and the water and paper come into intimate contact. At this time, the atmosphere will apply pressure to the paper, so the cup will not leak water when inverted.
科学的世界真的很神奇呢。
The world of science is really magical.