be certain

The symptoms may be exacerbated by certain drugs.

这些症状可能会因为某些药物而加重。

Be certain you catch your train on time.

务必准时赶上火车.

Brazil need to beat Uruguay to be certain of a place in the finals.

巴西必须击败乌拉圭才能确保进入决赛。

I am afraid I can not be certain about that.

恐怕此事我不能肯定.

Be certain to eat slowly and chew your food extremely well.

一定要慢慢吃，要细细咀嚼。

Would it be possible to see a list of your patients, just to be certain?

再确定一下, 别人能看到你们病人的名单 吗 ?

For certain personal reasons I shall not be able to attend.

由于某种个人原因，我将不能出席。

You may be certain ( that ) the situation be in our favor.

你可以肯定形势对人们有利.

We can only guess ( ie We cannot be certain about ) what happened.

我们只能猜测发生了什麽事.

As with all diseases, certain groups will be more at risk than others.

所有的疾病都是如此，一些人比另一些人更容易受到威胁。

There will be certain people who'll say "I told you so!"

一定有人会说：“我怎么跟你说来着！”

You may be certain he never went back to school.

你可以肯定,他决不会回学校.

It can be seen that certain groups are more at risk than others.

看得出，有的组风险大，有的组风险小。

You may be certain ( that ) the situation is in our favor.

你可以肯定形势对我们有利.

The work must be completed within a certain time limit.

这项工作必须在一定期限内完成。

There may be certain times of day when smokers crave their cigarette.

吸烟者可能会在一天中的某些时刻特别想吸烟。

How can we be certain that the chosen assignment is the right one?

我们又怎样才能确信所选择的赋值是正确的 呢 ?

I believe, We will success in the futher. be certain to.

我坚信, 我将来也是要成功的. 一定会.

Could you check again to be certain it is missing?

您再检查一遍,确定是否遗失了,好 吗 ?

You must be certain of your facts before you start flinging accusations.

必须对实情胸有成竹才能理直气壮地指责.