I could come next week, or the week after.

　　我可能下周來，或者再下一周。

　　The first 24 hours after the operation are the most critical.

　　病人手術(shù)后頭24小時是最危險的。

　　An accurate diagnosis was made after a series of tests.

　　準確的診斷是在一系列的檢查后作出的。

　　The child disappeared from his home some time after four.

　　這孩子四點多的時候就離家不見了。

　　The traffic took a long time to clear after the accident.

　　事故過去后很長時間交通才恢復(fù)暢通。