密度: 1.(密集的程度) density; thickness 短语和例子火力密度 density of fire; 兵力密度 density of troops; 那个国家的人口密度为每平方英里685人。 the population density of that country is 685 per square mile.2.[物理学] (物体的质量和其体积的比值) de
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Acoustics - determination of sound power levels of noise sources using sound intensity - part 2 : measurement by scanning 声学.用声密度测定噪声源的声能级.第2部分:扫描法测定
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Acoustics - determination of sound power levels of noise sources using sound intensity - part 1 : measurement at discrete points 声学.用声密度测定噪声源的声功率级.第1部分:不连续点的测量
