vi. 抱怨，诉苦；申诉，控诉，抗议；
vt. 诉说，申诉，控告[后面常跟从句]；
complain作不及物动词
1. 抱怨,发牢骚;诉说(病痛等)[(+to/about/of)]
I've really got nothing to complain of.
我确实没有什么可抱怨的。
He complained to me about the food.
他向我抱怨伙食不佳。
2. 控诉,投诉[(+to/about/of)]
He complained to the police of the boys stealing his apples.
他向警方控告那些男孩偷他的苹果。
complain作及物动词
1. 抱怨;控诉
He complained that the exam was too hard.
他抱怨考试太难了。
1. If you're not satisfied with the life you're living, don't just complain. Do something about it.
对于现况的不满，不能只是抱怨，要有作出改变。
2. Faculty members complain that their students are unprepared to do college-level work.
学院的老师们抱怨说他们的学生还很不适应大学的课业。
3. He came to complain about the volume of the music.
他过来抱怨音乐的音量太高了。
4. People usually complain about having to deal with too much bureaucracy.
人们经常抱怨不得不应付太多的繁文缛节。
5. If you are not happy about a repair, go back and complain.
如果你对修理效果不满意，可以再找他们投诉。
6. People complain about how children spend so much time on computer games.
人们常抱怨孩子花太多时间玩电脑游戏。