In 2005, a NASA science mission called Deep Impact crashed an 816-pound copper mass into a comet to learn more about its icy interior.

2005年，美国宇航局的一项叫做深度撞击的科学任务，是用一块816磅重的铜质物体撞击一颗彗星，以了解其内部更冰冷的物质。

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Some young punk at Sunday Mass tried to Papal Pound me.

一些年轻的朋克在星期天弥撒时试图给我来个教皇式捶打。

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The clinic advised that my body mass index (BMI), at just under 23, was borderline fat and that I should consider losing a pound or two.

诊所认为我的各项身体指数（BMI—body mass index）接近23，而23正好是肥胖的分界线。 所以我得考虑减掉一两磅。

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Knowing when to harvest the agave's heart--the 50-to-80-pound mass from which juices are extracted--is an art.

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Undoubtedly, the first thing you'll notice is the mass of the 62.9-pound (28.6 kg) kit.

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