例句:For certain reasons I will be unable to attend the meeting.
因?yàn)槟撤N原因,我不能出席這次會議。
certainly adv. 的確,(口語)當(dāng)然,行
例句:You certainly did well today.
你今天做得不錯(cuò)。
certainty n. 確定,確實(shí)的事情
例句:I can’t say with certainty what project they arc engaged in.
我無法肯定他們在進(jìn)行什么項(xiàng)目。
ascertain vt. 確定,探知
例句:My purpose is to ascertain whether you are interested or not.
我的目的是要確定你是否感興趣。
uncertain adj. 無常的,不確定的,不可預(yù)測的,靠不住的
例句:I am still uncertain whether Henry will come today.
我仍不能肯定亨利今天是否會來。