concentrations造句
In heavy
concentrations, ozone is irritating to the eyes, nose and throat.
高浓度的臭氧会对眼睛、鼻子和咽喉有刺激作用。
Large
concentrations of capital were in the hands of merchants.
大量资本集中在商人手里.
The latest data showed that global ozone
concentrations had dropped several per cent over the last decade.
最新数据显示，过去10年来全球臭氧的浓度降低了几个百分点。