更新时间：2025-08-07 14:28:36
Airisallaroundus.Itisaroundusaswewalkandplay.Fromthetimewewerebornairisaroundusoneveryside.Whenwesitdown,itisaroundus.Whenwegotobed,airisalsoaroundus.Weliveinair.Wecanlivewithoutfoodorwaterforafewdays,butwecannotliveformorethanafewminuteswithoutair.Wetakeinair.Whenweareworkingorrunningweneedmoreair.Whenweareasleep,weneedlessair.Weliveinair,butwecannotseeit.Wecanonlyfeelitwhenitismoving.Movingairiscalledwind.Howcanwemakeairmove?Hereisoneway.Holdanopenbookinfrontofyourface,closeitquickly.Whatcanyoufeel?Whatyoufeelisair.
空气
我们周围到处都是空气。当我们走路和玩耍时，它就在我们身边。从我们出生的那一刻起，空气就在我们身边。当我们坐下时，它就在我们身边。当我们上床睡觉时，空气也在我们周围。我们生活在空气中。没有食物和水我们可以活几天，但是没有空气我们不能活上几分钟。我们接受空气。当我们工作或跑步时，我们需要更多的空气。当我们睡着的时候，我们需要更少的空气。我们生活在空气中，但我们看不见它。只有在移动时我们才能感受到它。移动的空气叫风。我们怎样使空气运动?这里有一条路。把一本打开的书放在你面前，快把它合上。你能感觉到什么?你所感受到的是空气。
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