A certain ruler in the Middle Ages was famous for poisoning her guests with chemicals put into their drinks.

There are certain things he does that drive me mad.

他的某些举动让我很生气。

He was too certain of her love to be deceived by such talk.

他确信她的爱,因而不会被这种谣言所欺骗.

We are certain to win the game.

我们一定能打胜这场比赛.

It'seemed certain that this would win the prize.

这一块会得奖,这似乎是肯定的了.

When the doctor answered the phone, Mr gilbert said he was inquiring about a certain patient, a Mr gilbert.

当医生接电话时, 吉尔伯特先生说,他是在打听一位叫吉尔伯特先生的病人.

It all depends. I have certain doubts about it.

这很难说, 得看情况.

It is certain that two and two makes four.

二加二等于四是确定无疑的.

The symptoms may be exacerbated by certain drugs.

这些症状可能会因为某些药物而加重。

I was no sooner certain of this than I began to feel sick, faint, and terrified.

我刚确定他已经死了,便立刻感到恶心 、 头晕 、 恐惧.

He got up at six so as to make certain of being in time.

他六时起床以确保准时.

" Why, Aleck, I could do it and not be found out -- I'm certain of it. "

“ 嗨, 艾莱柯, 我能做得神不知鬼不觉 —— 我保证. ”

He philosophized, he admitted, not because he was certain of establishing the truth, but because it gave him pleasure.

他承认自己高谈阔论不是因为他确定找到了真理，而是因为那给了他很多乐趣。

I'm quite certain of it-she looks so malicious.

我相信一定是的 —— 她的样子显得那样恶毒.

She is a confident woman who is certain of her views.

她是一位充满自信的女性，对自己的观点深信不疑。

This letter made me certain of his innocence.

这封信使我相信他是无罪的.

We are certain of success.

我们确信会成功.

If only they wanted to buy, Mr. Lin's shop was certain of trade.

只要他们存心买, 林先生的营业是有把握的.

He felt quite certain of success.

他对成功很有把握.

I'm certainly not scared of him.

我当然不怕他。

I should certainly be on my guard if I were you.

我要是你肯定会保持警惕.