保持双手半握拳，手指轻抵手掌，恰似你每只手攥着一片薯片，但不能压碎它的感觉。
Keep your hands in an unclenched fist, with your fingers lightly touching your palms. Imagine yourself trying to carry a potato chip in each hand without crushing it.
美国国家航空航天局(NASA)将采用一种古老方法来测试未来火箭的设计方案，把一个没有盖子的大铝罐逐渐慢慢的加压，直至把它压碎。
To test future rocket designs, NASA is employing an age-old bar trick: Slowly and deliberately apply pressure to an aluminum can until it crumples. No foreheads will be involved, however.
汽车辗过箱子时把它给压碎了。
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