“ppm”的概念、定义、翻译、参考文献-科学参考

单词	ppm
释义	ppm Chemical Engineering An abbreviation for parts per million. That is, the number of parts of something per million parts in total. It is often used as a measure of the level of impurities in solids, liquids, and gases. Computer Abbrev. for pages per minute. Geology and Earth Sciences Parts per million.
随便看	direct stroke direct sum direct tax direct transition direct variation direct voltage direct wave DirectX Dirichlet beta function Dirichlet distribution Dirichlet function Dirichlet, Johann Peter Gustav Lejeune (1805–59) Dirichlet, (Peter Gustav) Lejeune Dirichlet, Peter Gustav Lejeune (1805–59) Dirichlet problem Dirichlet region Dirichlet series Dirichlet tessellation Dirichlet’s approximation theorem Dirichlet’s test dirigisme dirt cone dirty connection dirty data dirty floating

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