Intensity is a measure of powerperunitarea, 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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But the conventional activated sludge process technology has some shortcomings: long water residence time, low processing powerperunitarea, large area reactor, sludge bulking and so on.