水壓隨水深而增大

　　Directions   Study the diagram below. Then write a composition to explain how this experiment proves the idea that pressure iocreases with depth. Your composition should be between l20 to 140 words.

　　Pressure Increases with Depth

　　Here is a picture of a tall cylinder with three holes under thefaucet. The water keeps running from the faucet through the water tap into the cylinder. As there are three holes in it, the cylinder can never be filled and keeps leaking water.

　　From the way water is corning out of the holes we can see pressure increases with depth.

　　Let us look at the first hole on the top. As the hole is very near to the surface of water, the pressure at the top is not as high as that in the middle and at the bottom. The water is coming out of the hole at an angle of 30 degrees. It fails to the ground at a distance not far from the cylinder.

　　Now please have a look at the hole in the middle. The hole is farther away from the surface of the water. Here the water is deeper and so is the pressure. As a result the falling water comes down with more force at an angle of 45 degrees.

　　Last and not least, I would like to call your attention to the hole at the bottom. As it is deep at the bottom, the water receives the moist pressure. The force of water coming out of the hole is strongest and it springs out at an angle of nearly 170 degrees falling down far away from the cylinder.

　　Now it is clear to me why man achieves success under great pressure, My dear friends, do not bo afraid of pressuro. The more pressute, the more chance of success.

　　水壓隨水深而增大

　　這是一幅畫，畫的是水龍頭下有3個孔的高高圓筒，水不斷從水管通過龍頭流入圓筒。因為筒上有3個孔，圓筒永遠(yuǎn)裝不滿，水不斷泄出。

　　從水自孔中流出的情況，可以看到壓力隨水的深度而增大讓我們看圓筒頂上的第1孔。因為離水面近，頂部的水壓不如中間和底部的水壓大。水從孔里成30度角涌出，落到離圓筒不遠(yuǎn)的地方。

　　再看中間的孔。這里離水表面深一些，水較深，壓力也較大。因此，水成45度角，以較大的力落下。

　　最后，但不是最不重要，請注意底部的孔。因為在底部深處，水壓最大，流出孔時水力最強(qiáng)，成170度角沖出，落到離圓筒很遠(yuǎn)的地方。

　　現(xiàn)在，我明白了人為什么能在有巨大壓力的情況下獲得成功的道理。親愛的朋友，不要害怕壓力。壓力越大，成功的機(jī)會就越多。