柯林斯英汉双解大词典
per-
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1.
PREFIX through 表示“通过”
例：pervade
双语例句原声例句权威例句
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价格为每人40元。
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The meat ration was down to one pound per person per week.
肉类的配给量降到了每人每周一磅。
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Income per head rose perceptibly.
各人的收入明显提高了。
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She says people would not even notice a difference in taste with three grams, or one-half teaspoon, less salt per day.
VOA: special.2010.01.27
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The piston has a cross-sectional area, a, and the force pressure is force per volume area.
我们以活塞系统为例，来说明膨胀功。
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We don't usually do our chemistry calculations in miles per hour, so let's switch that to 42 meters per second, so it's -- sorry, it's 94 miles per hour.
在化学计算中我们很少,用英里每小时，所以我们把它换算为42米每秒，对不起，它是94英里每小时。
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