So energy expert Eric Potter says it is too early to know how the new gas shale reserves will affect the market.

VOA: special.2009.10.23

For most children and most of you, I hope, the answer's pretty clear: Autistic children will often just shrug, say, "How could I know?"

对于多数儿童和成人来说,但愿,答案非常明显,孤独症儿童通常只是耸耸肩,说,"我怎么会知道"

耶鲁公开课 - 心理学导论课程节选

and they get to know you and maybe assess how good you will be in the lab, so I think,

了解你，评估你在实验室里怎么样，所以我觉得，

要考入大学 - SpeakingMax英语口语达人

He said the Earth is like a large mechanical device that will survive only if people living on it know how to operate it correctly.

VOA: special.2010.05.30

You shoot something, you should know when it will land, where it will land, with what speed it will land, how high it will go.

抛出一个物体,我们要知道落地时间,落地位置,还有落地的速度,最高点的高度

耶鲁公开课 - 基础物理课程节选

Jeffrey Olson says experts do not know what will take the place of the plants and animals that are lost, or how wildlife will survive in a changed environment.

VOA: special.2009.09.28

How do we know that mag will reduce titanium tetrachloride?

我们如何知道,镁会还原四氯化钛？

麻省理工公开课 - 固态化学导论课程节选

We are worried because we do not know how long they will stay or how we will take care of them.

VOA: standard.2009.10.27

I think that in the next decade we will probably know how these cells actually work and the ear catches up to vision smell and taste in that regard.

我还相信，未来的十年中,我们也许能探明这些细胞的机理,赶上视觉，嗅觉和味觉,这些领域的研究。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

Otherwise,he warns, the great Iranian nation which has developed its own nuclear technology will produce the fuel by using its own know-how.

VOA: standard.2009.11.28

So, we paid one dividend and I don't know how much excitement it generated, but that's the Does this mean that share price will drop by $2 after a $2 dividend?

所以我们分了一次红,我不知道这引起了多大的兴奋,但这是,分了两美元股利后,是不是每股价格就会下降两美元

耶鲁公开课 - 金融市场课程节选

Colin Macpherson, a professor of Earth sciences at Britain's Durham University, says it's impossible to know how long the volcano will continue to erupt.

VOA: standard.2010.04.16

I circled this P -if any of you have taken statistics will know what that means, but it's the statistical term that tells you how significant these findings are.

我重点圈起了P,学过统计学的就知道这是什么意思,这是统计学的术语,它告诉我们,这些数据的重要程度

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

so we will know how we are really doing when we treat this condition,"

VOA: standard.2010.01.01

For example, if you're talking about the chalk--if I throw the chalk, you will have to know where it is and how fast it's moving.

比如说,这支粉笔,如果我扔出这支粉笔,你就像知道它的位置和速度

耶鲁公开课 - 基础物理课程节选

He says it is difficult to know how the disease will evolve.

VOA: standard.2009.05.14