An extremely adverse environmental condition, such as air pollution.
一种极端不利的环境条件，如空气污染。
There is an extremely adverse environmental condition, such as air pollution.
这有一种极端不利的环境条件，如空气污染。
The quality of groundwater has been reflected by the basic condition and pollution.
地下水水质基本状况和污染程度反映了地下水环境质量的好坏。
Their was no modern air-condition, and air pollution from factories was a problem.
他们没有现代的空调设施，但是来自于工厂的空气污染却是一个问题。
The aim is maintain engineering machine's condition and minimum pollution to circumstance.
其目标是保持和恢复装备的规定状态和实现对环境影响最小。
The aim is maintain engineering machine's condition and minimum pollution to circumstance.
其目标是保持和恢复装备的规定状态和实现对环境影响最小。
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