比如，你的日常开支费用是1000美元，单位边际收益是10美元，那么你的收支平衡数量就是1000美元/10美元，或者100件。

For example, if your overhead costs were $1,000 and your contribution margin from each unit you sell is $10, then your break-even in units would be $1000/$10 or 100 units.

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新的更大的市政厅将会更加节能，单位面积所需的采暖和制冷费用都比旧建筑少。

The new, larger building would be more energy efficient, costing less per square foot to heat and cool than the old hall.

youdao

他指出，为了满足美国现有的战斗单位，每年的费用需要增加2%到3%。

Just to keep up America's existing combat units, he notes, costs 2-3% more each year.

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