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把一塊浸了酒精的棉花點燃,放進瓶子里,把剝了殼的熟雞蛋放在瓶口,一會兒火焰熄滅,瓶子冷卻裏面氣壓變小,大氣壓就會把雞蛋壓進去. 把瓶子倒過來,雞蛋在瓶口,在瓶子外面用熱水澆,裏面空氣膨脹,就把雞蛋從瓶子里吐出來了.
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