be certain about的意思|示意

Kids will be curious about it when they reach a certain age.

当孩子到达一定年龄时，他们对这个会很好奇。

I'm afraid I can't be certain about that until next week.

恐怕要等到下星期我才能确定。

We cannot predict with certainty what the future will bring, but we can be certain about the issues that will define our times.

我们不能肯定地预测到未来是怎样的，但是我们可以肯定哪些问题将会确定我们的时代。

We can't be completely certain about the nature of the recession and weak recovery, but we can be confident enough to know what general actions are necessary. As Peter Diamond says.

我们不能完全确定经济衰退和疲弱复苏的本质，但是我们很确信，从总体上来说，应该采取什么样的行动。

Kids who have certain bacterial infections can be very compulsive about touching their mouths, which helps the spread.

有些孩子感染某种细菌之后会强迫性的触碰他们的嘴，这有助于细菌传播。

There may very well be a great shortage of labor of certain kinds, with no prospect of any shifting or adapting which will bring about an increased supply.

某些种类的劳动力很可能会大量短缺——我们对经过转移或适应而带来劳动力的增加实在不抱希望。