n. 盖子, 封面, 藉口

vt. 覆盖, 掩饰, 保护, 掩护, 包括

vi. 覆盖

n. the act of concealing the existence of something by obstructing the view of it

n. fire that makes it difficult for the enemy to fire on your own individuals or formations

n. a recording of a song that was first recorded or made popular by somebody else

n. a false identity and background (especially one created for an undercover agent)