It was a common concern about potable water deep purification due to the serious increasing water pollution.

由于水污染日益严重，饮用水深度净化引起人们普遍关注。

youdao

It was a common concern about potable water deep purification due to the serious increasing water pollution.

由于水污染日益严重，饮用水深度净化引起人们普遍关注。

youdao