scum 雅思GRE专八

Drug dealers are the scum of the earth.

毒品贩子是社会的渣滓。

Some interview content very expatiatory, how to take its flower, go its scum?

有些采访内容十分冗长，如何取其精华，去其糟粕呢？

There is a ring of scum in the washbasin.

这个脸盆内有一圈污垢。

There was green scum over the pond.

池塘水面有绿色的浮藻。

Simulates the multi-hearth work condition,promotes to uses the zinc volatility kiln processing zinc scum dechlorinate,by this increase income earning of an enterprise.

模拟多膛炉作业条件,推广至采用锌挥理锌浮渣脱氯,以此增加企业收益。