ppm的意思

ppm

基本解释

abbr. 百万分率，百万分之…（parts per million）

英文词源

ppm: abbreviation of parts per million, attested by 1913.

实用例句

1. The term parts per million ( ppm ) was widely used but frequently led to misinterpretation.: 广泛使用百分之几 ( ppm ) 表示结果,但常常引起误解.

2. Note: PPM means part per million usually a measure of quality.: 注: PPM是百万分之一件的缩写通常是质量的一种指标.

3. Objective : To study implement effect of PPM - tuberculosis control project in city.: 目的: 探讨在城区实施PPM-DOTS项目的效果情况.

4. This article presents a class for using PPM to compress a file.: 本文介绍了使用PPM的压缩文件一类.

5. Probabilistic Packet Marking ( PPM ) is an efficient and practical scheme.: 概率包标记 ( PPM ) 是一种比较有效且实用的解决方法.

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