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| physical measurement of pollution The quantitative determination of the presence, extent or type of pollutant substances in the environment using mechanical means, including optical, electrical, acoustical and thermodynamic techniques (定量测定污染存在的程度和类型，污染物的测定中使用的机械方法包括：光学、电子学、声学和热力学的基本技术。) | |||
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