英语词汇“PPM”的读音、翻译、释义、用法及例句-语文网

词汇	PPM
释义	PPM 百万分之一 parts per million的简称，即百万分之一，为微量分析、计量上用来表示浓度的单位，日常生活中常用在空气污染、水污染等各种微量物质的分析上。例如一公升的水中含某物5毫克，即称该物的浓度为5PPM.
随便看	sunbonnet sunbonneted sunbow sunburn sunburned sunburnt sunburst sun cream sun-cured sundae Sunday Sunday best Sunday driver Sunday punch Sundays Sundays and holidays excepted Sundays and holidays excepted,even if used Sundays and holidays excepted,unless used Sundays and holidays included Sunday school Sunday-school sundeck sunder sunderance sundew

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