An examination is carried out before the ion of the tube.

　　插入導管前先要進行檢查。

　　On closer examination it was found that the signature was not genuine.

　　經過進一步認真檢查發現簽名是偽造的'。

　　All students without exception must take the English examination.

　　所有學生都必須參加英語考試，無一例外。

　　The experiments were carried out under simulated examination conditions.

　　試驗是在模擬的情況下進行的。

　　Applicants are selected for jobs on the results of a competitive examination.

　　競聘者按遴選考試結果擇優錄用。