part per million (ppm) meaning in English

百万分比

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。
For swimming pools using ozone for disinfection , ensure that the water should contain not less than 0 . 5 parts per million ( ppm ) of chlorine
如泳池使用臭氧消毒，应确保池水的氯含量不少于百万分之0 . 5 。
Chemical analysis of the two bottles of beauty cream obtained from the woman revealed that the mercury content of the products are 34 000 parts per million ( ppm ) and 38 000 ppm respectively
两个美颜霜样本的测试结果显示，它们所含的水银成份分别?百万份之三万四千及三万八千。
Chemical analysis of the products obtained from the woman by the government laboratory revealed that the mercury contents of them are 8900 parts per million ( ppm ) and 11 000 ppm respectively
政府化验所的测试结果显示，两种美颜霜所含的水银成份分别为百万份之八千九百及一万一千。
The content of benzene detected in one out of five test samples was only 0 . 1 parts per million ( ppm ) , well below the allowable level of 5 ppm which the european council ( ec ) considers as safe to be present in toys
测试结果显示，五款样本中只有一款验出苯成份，而苯成份只有百万份之零点一，远低于欧洲议会有关玩具或玩具配件的苯成份安全水平所订的百万份之五。