"幕"用英语表达为 "curtain"。
"Curtain" 来源于拉丁语 "cortina"，意思是 "分割物"，指的是用来隔开房间、舞台等的帘子。
例句:
She closed the curtain to block out the sunpght. (她关上了窗帘，挡住了阳光。)
The curtain rose, signapng the start of the play. (帷幕升起，标志着戏剧开始。)
He drew the curtain back to let in more pght. (他拉开了窗帘，让更多的光进来。)