a substance obtained from an insect that is melted into small thin pieces and used for making varnish (= a liquid for painting onto surfaces to make them shiny) and for many other purposes

The pottery is covered with a layer of varnish or shellac. 陶器上涂着一层清漆或虫胶漆。

A vinyl record would be far superior to a shellac record. 黑胶唱片比虫胶唱片好得多。

a brand name for a type of nail polish (= coloured liquid for painting on your nails) that consists of gel (= a thick, clear liquid) and traditional nail polish

Because Shellac is like a polish, it can't be used to extend the nail. 因为甲油胶就像指甲油一样，所以不能用来延长指甲。

Shellac nails can be removed by a manicurist within five to fifteen minutes. 美甲师可以在五到十五分钟内把甲油胶洗掉。