“浮渣一般的”可以翻译为“scum-like” 或者 “resembling scum”。例如：
* The surface of the polluted pond was covered with a scum-like layer.（被污染的池塘表面覆盖着一层浮渣一般的物质。）
* The dirty water had a resembling-scum appearance.（这脏水看起来浮渣一般。）