时候: dj123length of timemomentoccasionperiodwhenever
结束: finish; closure; foreclosure; end; terminate; conclude; wind up; close; come to an end; come to a close; put an end to; abolish; bring sth. to a close; draw to a close; make an end of sth.
什么时候: when; whenever 短语和例子船什么时候开走的? when did the ship leave
