Skim the scum off the jam and let it cool.

撇去果酱上的浮沫，让它冷却。

《牛津词典》

The mould and scum melt away.

霉斑不见了，污渍消失了。

youdao

There was green scum over the pond.

池塘水面有绿色的浮藻。

youdao

When the meat is boiling, remove the scum.

当肉煮沸时，把浮在上面的浮渣撇掉。

youdao

Scum the bubble when the porridge is boiling.

粥煮沸时，请把浮沫撇去。

youdao

Scum the bubble when the porridge is boiling.

粥煮沸时，请把浮沫撇去。

youdao