That means the drug-tainted wastewater can enter groundwater and surface water, which are collectively the major sources of drinking water for most people.
这就意味着这些被药物污染的废水会进入地表水和地下水，而这正是大部分人饮用水的水源。
Therefore, the activation of the surface modification of polytetrafluoroethylene, mostly by plasma processing method, convenient operation, significantly reduce the wastewater treatment.
因此，目前对于聚四氟乙烯表面的活化处理，大多采用等离子体处理法进行，操作方便，还明显减少了废水处理。
Surface subsidence and the discharge of refuse, wastewater and waste gas constitute the main impact of coal mining on the environment.
煤炭开采过程中对环境的主要影响有地表塌陷破坏和废石、废水、废气的排放。
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