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1·If you want to be certain of getting a ticket, book now.

要想有把握买到票，现在就得预订。《牛津词典》

2·They'll have to give up completely on certain of their studies.

他们将不得不完全放弃某些课程。《柯林斯英汉双解大词典》

3·Certain of those present were unwilling to discuss the matter further.

某些在场的人不愿意进一步讨论这个问题。《牛津词典》

4·My own experience made me feel certain of becoming a mentor this year and helping other students like myself.

我确信凭着自己的经历，今年会成为一名导师，帮助像我一样的学生。

5·I am certain of it, especially if it's difficult for a competitor to copy.

我对此非常确信，尤其是当竞争对手很难抄袭的时候。

6·Spurrier later admitted that he had been certain of the superiority of French wine and had done his best to tilt the contest in their favor.

斯普瑞尔后来承认，他确信法国葡萄酒的优势，并尽了最大努力使竞争朝着有利于他们的方向倾斜。

7·Time has winnowed out certain of the essays as superior.

历经岁月的淘洗，有些文章成为经典。《柯林斯英汉双解大词典》

8·You'll have to leave soon to make certain of getting there on time.

你得快点出发，好确保准时到达那里。《牛津词典》

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

他承认自己反复推究不是因为他确定找到了真理，而是因为那给了他很多乐趣。《柯林斯英汉双解大词典》

10·What Descartes has done is find at least one thing that he can be certain of.

笛卡尔所做的就是找到了至少一件他能确定的事。

确信

1·You can be certain of that.

你可以确信这一点。

有把握

1·He felt quite certain of success.

他感到相当有把握成功。