题目内容：

clean 和clean up和 clean out 的区别

优质解答

clean ,clean down,clean out,clean off 例如；It's time you cleaned__the drawers of your desk 打扫干净,整理,赚钱,获利.clean down,刷干净 clean out,清除,打扫干净 clean off扫除 例如；It's time you cleaned_...