它們的意思分別如下:1、check in(在旅館)登記入??；掛號；（在機(jī)場）驗(yàn)票（或護(hù)照等）；記錄，登記簽到例句:I'll ring the hotel. I'll tell them we'll check in tomorrow.(旅館入住)What time do I have to check in?(飛機(jī)檢票)2、check out (辦理退房手續(xù))結(jié)賬離開；檢查，核實(shí)；符合要求例句:I was disappointed to miss Bryan, who had just checked out.(結(jié)賬退房)She was in San Diego the weekend Jensen got killed. It checked out.(相符一致)。