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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·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。

3·But nobody can be certain of the outcome.

但是，谁也不确定这就是结局。

4·So therefore, I can at least be certain of those.

因此，至少那些我是能够确认的。

5·China needs to be certain of having a nuclear second strike.

中国需明确无疑地拥有二次核打击能力。

6·From one moment to the next, no one can be certain of anything.

从一个时刻到下一时刻，没有什么人能确定什么事情。

7·But the company can at least be certain of some things in the coming years.

但是，耐克公司至少可以确定公司未来几年的美好前景。

8·How long do we have to run an experiment before we can be certain of the results?

我们进行多久测试后才能确定得到的结果？

9·Remember that even if you don't know everything, you can still be certain of what you expect.

记着，即便你不知道一切，可是你还是能对于期望的东西肯定。

10·I wanted to be certain of my own wisdom by copying Solomon, who had knowledge of hyssop and of tree.

我希望仿效通晓牛膝草和树木知识的所罗门王，确信自己的智慧。