unit area

基本解釋

It should be a pressure which is a force per unit area.
它應(yīng)該等于壓強(qiáng),或者說是單位面積上的受力。
The density for a flat object would be the mass per unit area.
一個平面物體的密度是每單位面積元的質(zhì)量。
The other way to think about it is divergence is the source rate, it is the amount of fluid that is being inserted into the system, that is being pumped into the system per unit time per unit area.
另外一個理解方法是，散度是源頭的“冒出率”,它是流體往系統(tǒng)輸入的量，也就是單位時間內(nèi)，單位面積新冒出的流體。

But they also have the highest sales per unit area of any U.S. retailer, double that of Tiffany.
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They can carry five to 20 times more current in the same unit area while reducing the amount of energy lost as heat by 75-97% (depending on whether the current is alternating or direct), even after accounting for all the nitrogen-cooling paraphernalia.
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Last month Hanoi also dispatched 1, 200 members of an elite police unit to the area.
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