Former Securities and Exchange Commission Chairman Harvey Pitt said it is yet to be seen whether Madoff will cooperate in the investigation.

VOA: standard.2009.03.12

All right. So let's test what we, in fact, know about the photoelectric effect, and before we do that actually, we're going to calculate what we would predict, so when we do the demo it will be meaningful and we can tell whether we're successful or not.

好的，我们来测试一些，我们实际上懂了,多少光电效应的东西，在我们做测试之前，我们先算一下我们能预知什么，这样我们做的测试会很有意义,并且也知道我们是否成功了。

麻省理工公开课 - 化学原理课程节选

And in so far as it is possible for me, to try to preempt what that impact or effect might be in the sense of trying to figure out whether or not it will have an impact on you and what it might be.

只要有可能，我就会通过自己对诗歌的感受,来试图推断这首诗,是否会对读者产生冲击，会产生怎样的冲击。

普林斯顿公开课 - 人性课程节选

Smith says it is not known whether or not Hariri's second attempt will be more successful.

VOA: standard.2009.09.24

So many of the people we'll talk about, whether it's Bob Fredrickson who we'll talk about in a few minutes, David Cooper whether it's David Cooper we'll talk about, Martin Seligman whether it's Martin Seligman of course, will come there and present to you and you'll be spending quality time in small groups with them.

我们将会谈到的很多人，比如Bob，Fredrickson，过一会我们会谈到他，或者以后会谈到的，当然还有，都会去那里给大家讲座,你将和他们亲密相处。

哈佛公开课 - 幸福课课程节选

"I'm very happy about it." "I don't know whether this will be my main stopping point or not, but it certainly does give meanother option."

VOA: standard.2010.07.28

Whether or not it will bear as much fruit remains to be seen.

VOA: standard.2009.03.11

As always in the World Cup, there can only be one winner and only time will tell whether this time round it's the octopus or the parakeet.

VOA: standard.2010.07.09

"I don't think at this stage, nobody knows whether BP will be forced to be broken up, whether it might actually end up being so weakened that it falls into the arms of somebody else."

VOA: standard.2010.06.18