check in:check的最基本意思是“检查,核对”,指以确保某事物是否正确、安全、满意或处于良好状态,也可指检验以测试某事物的准确度或真假。
check out:check还可表示“抑制”“控制”“阻碍”,指如用马缰绳套住马以防其放荡不羁一样地“控制”,如阻止发展、耽搁、击败某种力量、消除某种影响等,暗指阻止的突然性及其所用的力量。
I put the books on the library desk,and the librarian checked them in.
我把书放在图书馆的柜台上,图书管理员验收了这些书。
The friends we had invited did not check in until Saturday.
我们邀请的朋友直到星期六才到达。
Guests must check out before noon,or they will be charged for the day.
客人必须在中午前结帐离开,否则将付全日费用。
The accountant checked out the bills and found them OK.
会计查对了帐单,发现正确无误。