a.
1. 确凿的,无疑的;可靠的
2. 确信的,有把握的;一定会的[F][(+of/about)][+(that)][+wh-][+to-v]
They are certain to succeed. (They are certain of success.) (They are certain that they will succeed.)
他们确信会成功。
I\'m quite certain of that.
对那事我完全可以肯定。
I was certain that he had seen me.
我肯定他已看见了我。
3. 某,一位姓...的(人)[B]
A certain person called on you yesterday.
昨天有个人来拜访过你。
4. 某种(或一定)程度的[B]
pron.
1. 某几个;某些[(+of)]