10ppm
例句释义:1.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。
10ppm
例句释义:1.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。