It will never be known how and when this numeration ability developed, but it is certain that numeration was well developed by the time humans had formed even semi-permanent settlements.

我们永远也不会知道这种计算能力是何时、如何发展起来的，但可以肯定的是，在人类形成半永久定居点的时候，这种计数法已经发展得很好了。

youdao

As she put it, it is certain that the painting "is not a Jackson Pollock."

正如她所说，可以肯定的是画“绝对不是杰克逊·波洛克画的”。

youdao

Though it is unclear as to what their aims are, it is certain that they must be stopped at all costs.

尽管还不清楚他们的目的究竟是什么，但是可以确定的是必须不惜一切代价阻止他们。

youdao

It is certain that Billy Demong of the United States will never forget the Vancouver games.

VOA: standard.2010.02.27

One is time, that I think it takes certain amount of time to shed the thoughts, the anxiety in everything else.

第一是时间，要想,摆脱一些想法，摆脱焦虑，是需要一定的时间的。

普林斯顿公开课 - 人性课程节选

The word "yellow" in the second line of Tony the Tow Truck-- its denotation is that it is a certain color, the color that Tony's garage is painted.

搬运车托尼》中第二行的“黄色“,他的表面意义就是一种颜色，垃圾箱的颜色。

耶鲁公开课 - 文学理论导论课程节选

But it is certain that this mortality burden will not be equally distributed around the world.

CNN: Highlights from the world's press

It is certain that traditional online job boards like Monster.com are on the way out.

FORBES: The Facebook Job Board Is Here: Recruiting Will Never Look The Same

And it is certain that they will set the proper tone from the top down.

FORBES: Judging The SEC's Division Of Enforcement With 20/20 Foresight