Air is all around us. It is around us as we walk and play. From the time we were born air is around us on every side. When we sit down, it is around us. When we go to bed, air is also around us. We live in air. We can live without food or water for a few days, but we cannot live for more than a few minutes without air. We take in air. When we are working or running we need more air. When we are asleep, we need less air. We live in air, but we cannot see it. We can only feel it when it is moving. Moving air is called wind. How can we make air move? Here is one way. Hold an open book in front of your face, close it quickly. What can you feel? What you feel is air.
空氣就在我們周圍，在我們散步和玩耍的時候四處存在。從我們出生開始我們周圍的空氣無處不在。當我們坐下來，它在我們周圍。當我們睡覺時，空氣也在我們周圍。我們生活在空氣中。我們沒有食物或水還可以生存幾天，但我們沒有空氣就不能存活超過幾分鐘。我們吸進空氣。當我們工作或跑步時我們需要更多的空氣。當我們睡著了，我們需要較少的空氣。我們生活在空氣中，但我們看不見它。我們只能在它移動的時候感覺到它。流動的空氣被稱為風。我們怎樣才能使空氣流動?這是方法之一：在你的面前攤開一本書，快速合上它。你能看到什么?你感受到的就是空氣。