check in 1. register in a hotel；report one's arrival 在旅館登記住宿；報(bào)到；簽到 如： Have you checked in at the hotel yet？ 你在旅館登記住宿了嗎？ The friends we had invited did not check in until Saturday． 我們邀請的朋友直到星期六才到達(dá)。 2. receive sth. that is returned and make a record of it 接收并登記（歸還物品） 如： I put the books on the library desk，and the librarian checked them in． 我把書放在圖書館的柜臺(tái)上，圖書管理員驗(yàn)收了這些書。 check out 1．pay the bill and leave 結(jié)帳離開 如： Guests must check out before noon，or they will be charged for the day． 客人必須在中午前結(jié)帳離開，否則將付全日費(fèi)用。 2．confirm by carefully checking 檢驗(yàn)無誤；核實(shí) 如： The accountant checked out the bills and found them OK． 會(huì)計(jì)查對了帳單，發(fā)現(xiàn)正確無誤。 Please check out each room to see if it is fit for a guest． 請檢查每個(gè)房間看看是否適合客人住。 翻譯以下句子： ①我們必須在8點(diǎn)到辦公樓簽到。 ②我們付了旅館費(fèi)以后，就直接去飛機(jī)場了。 ③請檢驗(yàn)一下姓名和號(hào)碼好嗎？ ④兩小時(shí)前他們辦理了離開手續(xù)。 Keys： ①We have to check in at the office building at 8∶00. ②We headed directly for the airport after we had checked out of the hotel． ③Would you check out these names and numbers，please？ ④They checked out two hours ago．