ppm
- abbr. 百萬分率，百萬分之…（parts per million）
英文詞源
- ppm
- abbreviation of parts per million, attested by 1913.
雙語例句
- 1. The term parts per million ( ppm ) was widely used but frequently led to misinterpretation.
- 廣泛使用百分之幾 ( ppm ) 表示結果,但常常引起誤解.
來自辭典例句
- 2. Note: PPM means part per million usually a measure of quality.
- 注: PPM是百萬分之一件的縮寫通常是質量的一種指標.
來自互聯網
- 3. Objective : To study implement effect of PPM - tuberculosis control project in city.
- 目的: 探討在城區實施PPM-DOTS項目的效果情況.
來自互聯網
- 4. This article presents a class for using PPM to compress a file.
- 本文介紹了使用PPM的壓縮文件一類.
來自互聯網
- 5. Probabilistic Packet Marking ( PPM ) is an efficient and practical scheme.
- 概率包標記 ( PPM ) 是一種比較有效且實用的解決方法.
來自互聯網