The treatment should be repeated every two to three hours.

　　這種治療方法應(yīng)該每隔兩到三小時(shí)重復(fù)一次。

　　He repeated none of the errors he'd made first time round.

　　他沒(méi)有重復(fù)過(guò)首次所犯下的任何錯(cuò)誤。

　　Repeat these five steps, as in the last exercise.

　　照前面的練習(xí)一樣，重復(fù)這五個(gè)步驟。