ppm怎么读，ppm的音标和真人发音
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['pi:p'i:'em]
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ppm是什么意思，ppm的意思是
abbr.part per million 百万分之…
星级词汇:
ppm 的用法和双语例句“点击”或“选中”例句中的单词，就可以看到词义解释
- Concentrations of 10 ppm can be endured for only a few minutes and cause profuse lacrimation in all people .
- 10ppm的浓度，只需几分钟，就会使所有的人流泪不止。
- It has a repulsive acidic odor that can usually be detected at or below a concentration of 5 ppm .
- 它有一种另人厌恶的酸味，在浓度为5ppm或以下可以察觉到。
- Type I Diabetes mellitus usually starts from adolescent , whose morbidity rate is about 83 ppm and still increases .
- I型糖尿病主要累及青少年，患病率万分之0.83，还在不断增长。
- By chance , oryza sativa is a like aluminum plant , its optimum concentration is 30 ppm was observed .
- 意外观察到水稻是喜铝植物，最适浓度是30ppm。
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