Intensity is a measure of power per unit area, and even a laser that emits only a few milli-watts can produce a lot of intensity in a beam that's only a millimeter in diameter.

强度是每单位面积的度量，即使一个仅能产生几毫瓦能量的激光器也能产生一个直径只有一毫米的高强度光束。

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A new conception of power per unit impedance is defined and the basic equation to express the variation of load voltage magnitude with the variation of its dynamic equivalent impedance a.

定义了单位阻抗功率的新概念，推导了电压幅值随其等值阻抗和单位阻抗功率变化而变化的基本方程序。

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But the conventional activated sludge process technology has some shortcomings: long water residence time, low processing power per unit area, large area reactor, sludge bulking and so on.

但是传统的活性污泥法工艺存在工艺流程长、污水停留时间长、单位面积处理能力低、反应池占地面积大、污泥膨胀等缺点。

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However, a spokesperson for Enron told the BBC that the average price of power per unit sold to the state government in the last year came to five Rupees and the cost will come down further once the Dabhol Power Co becomes a fully gas-based plant.

BBC: India casts doubt on Enron project

But the sober message about wind and solar applies to all renewables: All renewables, much as I love them, deliver only a small power per unit area, so if we want renewable facilities to supply power on a scale at all comparable to our consumption, those facilities must be big.

CNN: Commentary: Let's get real about alternative energy

And the logic works with servers as well as storage, as each device category continues to decrease in size, improve in capacity and performance, and reduce its power consumption per unit of work with each new generation.

FORBES: The Case for the Infinite Data Center