百万: million a very great number; ...几: how many百万分之几: parts per million ppm; ppm parts per million百万分之几分: ppm百万分之几级: parts per million range百万分之几,兆分率: parts per million百万分之几当量数: epm; equivalent per million兆北率百万分之几: partpermillionabbr.ppm百万分之: m＝part ermillion; ppm parts per million; ppm＝ parts per million百万分之一: fpir first piece inspection report; micro one millionth part; micron; mμ; one in a million; parts per million ppm; ppm part per million; ppm parts per million; ppm percent per million; volume per million百万分之当量: equivalent per million epm; equivalentpermillion百万分之一、微: micro百万分之一伏: microvolt百万分之一米: micron百万分之一秒: microsecond百万分之一升: lambda微(百万分之一): micro (m)一百万分之一: part per million百万分之一当量: equivalent per million epm百万分之一的机会: a million to one百万分之一的机遇: lesson a chance in a million百万分之一公厘: micromillimeter百万分之一航图: flight chart百万分之一容积: volume per million百万分之一微米: micromicron
