| 1. | The speed limit is 40 miles per hour . 规定的最高时速为每小时40英里。
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| 2. | The drag is a force per unit area of the layer . 拖力是流层单位面积的力。
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| 3. | Density exceeded 100 nests per mile . 丝巢密度超过每英里100巢。
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| 4. | The shares yield [pay] five per cent . 这些股票可产生5%的利润。
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| 5. | Consequently, income per capita stagnates . 其结果,人均国民收入停滞不前。
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| 6. | Bread was rationed to one loaf per family . 每户供应一个面包。
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| 7. | Interest on this loan is charged at 5 per cent ... 这笔贷款要支付5%的利息。
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| 8. | Can your car make a hundred miles per hour ? 你的汽车一小时能开一百英里吗?
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| 9. | The current is the charge flow per unit time . 电流是每单位时间流动的电荷。
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| 10. | Her car goes faster than 110 miles per hour ... 她的汽车的时速超过110英里。
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