concentration of chemical meaning in English

药液浓度

Thus , the steam in a shower contains a much higher concentration of chemicals than the water itself
因此，淋浴中的蒸气比水本身含有更高浓度的化学物质。
As with all chemical process used in the preparation of cotton , the relationship between temperature , length of treatment and concentration of chemical is important
在准备棉花的所有化学加工过程中，温度，时处理的时间长度和化学品的浓度之间的关系非常重要。
In fact , it is useful to remember that pollution can be defined as a concentration of chemical elements which are perfectly harmless on their own , but fatal when they reach a certain concentration
实际上，记住这一点是很有用的，即，污染可以被定义为：一种化学成分对自己无害，但是到达一定的浓度之后可以是致命的。