scum

英 /skʌm/ 　美 /skʌm/

n. 浮渣；浮垢An unpleasant layer of waste or bubbles on a liquid.
n. 人渣（侮辱语）An insulting word for people considered extremely unpleasant or immoral.

He skimmed the scum off the simmering soup.

他撇去了炖煮中的汤表面的浮沫。

A thick layer of scum on a pond may indicate excessive nutrient levels caused by agricultural runoff.

池塘表面厚厚的浮垢可能表明农业径流导致了水体营养物质过量。

搭配

skim off the scum 撇去浮渣a layer of scum 一层浮垢soap scum 皂垢

通常不可数；用来指人时侮辱性很强，应避免。

指人时是强烈侮辱语