As an experiment, go out and buy two identical bags of potato chips.
我們做個試驗，去買兩包一模一樣的薯片。
In one of them, use a needle to carefully poke a hole near the corner, and gently squeeze the bag to let out a lot of the air through that hole.
把其中一包用一根針在邊角的地方戳個小洞，慢慢把袋子裡的空氣擠出來。
Now find a friend and spend 5 minutes playing "catch" with each bag, tossing it back and forth between you across the room.
找個小夥伴花5分鐘把這兩包薯片來回扔。
Get two large bowls, and pour the contents of each bag into one of the bowls.
拿2個大碗，把2包薯片拆開分別倒在碗裡。
In one bowl, every chip is broken into small pieces. It's almost a bag of crumbs, not a bag of chips. This was the bag with not a lot of air in it.
其中一個碗裡的薯片都碎了，成了薯片碎屑。這是那包被放了氣的薯片。
In the other bowl, there are a few broken chips, but overall many more chips are still in good shape. This was the bag full of air.
另一個碗裡的薯片雖然有幾片碎的，但總體完好。這包是充了氣的薯片。
The air trapped in the bags help cushion the chips during transportation and handling, so that a better product is delivered.
這就說明包裝袋裡的空氣在薯片在運輸過程中，起到了「墊子」的作用，讓薯片不易碎。
(本微信號發布的所有英語材料，僅用於學習交流，非商業用途。這裡共享的所有作品都自有版權，任何對作品的不恰當使用或商業用途均涉及版權侵權，特此聲明。)
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