A short, tailless coat; also, an outer covering put on like a coat, but not used as clothing.

短外套；覆盖物。

A covering for protection, insulation, etc.

套；外被。

Skin (of a potato).

(马铃薯)皮。

A detachable protective cover for a book.

书套；封套。

To cover with, or as with, a jacket; protect by covering.

穿上外套 ；包上封套保护。