Scientists are not sure how Buruli ulcer disease spreads or even how it develops in nature.

VOA: special.2009.04.06

The first step is divide them in half. All right? I'm not sure how to mark it here, remember I need to come back there. I'm not yet done. What do I do?

我不能确定如何,在这里进行标记,记住我会回这里进行讲解,我还没做完呢？

麻省理工公开课 - 计算机科学及编程导论课程节选

I'm not sure how much it is.

我不太清楚它的价格。

I like实战 - SpeakingMax英语口语达人

Republican Congressman Jeff Flake said at the news conference he supports opening up to Cuba even though he is not sure how its government would react.

VOA: standard.2009.05.06

I'm not sure how many of us would decide the last thing we wanted to do with our remaining years is to spend it in college.

我不确定我们中有多少人会决定,在最后几年里要做的最后一件事是,上大学。

耶鲁公开课 - 死亡课程节选

Some of the guests were not sure what to think of Ellen and Doug's celebration -- or even how to describe it.

VOA: special.2011.05.23

Yes, I'm not sure how to describe that exactly.

是的，我不确定怎样能准确地描述。

耶鲁公开课 - 现代诗歌课程节选

There was something else that was worrying Oive, and she did not know just how to begin to talk about it At last,she spoke out, not sure what Nate's answer would be.

VOA: special.2010.01.09

I'm not sure how much this gonna be covered in the course, but I'm very interested in the way films are recieved by audience and the shock value that film can have be acceptable in film and through time how it changes.

我不知道这门课,会多大程度上和这个话题相关，但是我对此,电影被观众接受的方式和带给观众的冲击,和电影是如何随着时间不断变化的,很感兴趣。

麻省理工公开课 - 电影哲学课程节选

So,basically,that's how I started. Sometimes I'm not sure if I've done the right thing or not."

VOA: standard.2010.07.20

He got this from Marie Curie - you can imagine they used the postal service, I'm not sure how else they would have transferred it to each other.

当他从Marie，Curie拿到这个时,你们可以想象他们一定是把它，邮寄过去的,不然我不知道他们。

麻省理工公开课 - 化学原理课程节选

And that's basically trying to make sure our program has not regressed, as to say, gone backwards in how well it works. And so we always test it on everything.

这只是从根本上确保,我们的程序并没往后退，也就是说在可用性方面倒退了,因此我们在任何东西上,都要进行这样的测试。

麻省理工公开课 - 计算机科学及编程导论课程节选

So I differentiated this object, this is my first derivative and I set it equal to 0 Now in a second I'm going to work with that, but I want to make sure i'm going to find a maximum and not a minimum, so how do I make sure I'm finding a maximum and not a minimum?

这样我就对它求出导数了,这是一阶导数,令它等于0,一会我们就要计算了,但我先确定一下是最大值还是最小值,我怎么确定是最大值还是最小值呢

耶鲁公开课 - 博弈论课程节选

I don't know, I didn't go to business school so I'm not exactly sure how it works.

我不知道，我没在商学院上过学，所以我也不清楚它到底是怎样的。

哥伦比亚的氛围 - SpeakingMax英语口语达人

All right. So let's look at some of these wave functions and make sure that we know how to name all of them in terms of orbitals and not just in terms of their numbers.

好，让我们来看一下,这些波函数,并确定我们都知道,怎么用轨道,而不仅是量子数来命名它们,一旦我们可以命名它们。

麻省理工公开课 - 化学原理课程节选

I'm not quite sure where, on balance, we should say how these things play out.

我不是很肯定，总的来说，这些事情是怎么进行的。

耶鲁公开课 - 死亡课程节选

And I'm not quite sure how to draw that line.

而我并不确定界限在哪里。

耶鲁公开课 - 死亡课程节选