excuse/ ɪks'kjuːs /

1.noun [c/u] 
(justification) 借口

2.vt.[+person] [ behaviour] 
(justify) 是…的正当理由

3.vt.[+person] [ behaviour] 
(forgive) 原谅

an excuse to do/not to do sth
做/不做某事的借口
to make an excuse
找借口
to make excuses for sb
给某人找借口
there's no excuse for such behaviour
没有理由这样表现
to be excused from (doing) sth
被免除(做)某事
to excuse sb for sth/for doing sth
原谅某人某事/做某事
excuse me!
劳驾!
4.vt.
(as apology) 对不起!

excuse me, please
请原谅
excuse me?
 [US] 对不起,你说什么?
5.vt.
英 = pardon? {or} sorry?

he excused himself and left the room
他说了声“请原谅”就离开了房间
if you'll excuse me
请见谅