白色污染的源头是烟头。

White pollution source is cigarette butts.

youdao

河水是在源头受到污染的吗？

Is the water polluted at source?

youdao

结果造成了黄河源头的污染。

This has polluted the source of Yellow River.

youdao

仅在河流源头治理污染是不够的！

Tackling the water pollution at the head source of the rivers is not enough!

youdao

仅在河流源头治理污染是不够的！

Tackling the water pollution at the head source of the rivers is not enough!

youdao