ppm是什么意思

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.来自辞典例句

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.来自互联网

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.来自互联网

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.来自互联网

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.来自互联网