Installation Category II, Pollution Degree 2.
安装第二类，污染度2。
Summer and autumn are higher than winter and spring. Pollution degree is opposite.
污染程度则相反，冬春季高于夏秋季。
The quality situation and pollution degree of groundwater directly represent its environment quality.
地下水水质基本状况和污染程度直接反映地下水环境质量的好坏。
This will lessen the degree of air pollution.
这可以减轻空气污染的程度。
In order to control the detergent pollution to the minimum degree, we need your help.
为让洗涤济对环境的污染控制到最低的程度，我们需要您的帮助。
In order to control the detergent pollution to the minimum degree, we need your help.
为让洗涤济对环境的污染控制到最低的程度，我们需要您的帮助。
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