Tidy up - clean up

He's tidying up his house.他正在清理他的房子。

He has to tidy his office before his boss comes in.在家老板进来之前他必须清理好他的办公室。

tie up 捆牢， 拴住

His money is all tied up in stocks.他的钱全都拴在股票上

My schedule will be tied up tomorrow 我明天的日程排的满满的。

I was tied up in traffic  this morning. 今天早上我塞车了。