All Southerners who try to express themselves in art are very much aware that they are party to a defeat."

所有希望藉由艺术的方式,表达自身的南方人都很清楚,他们是战败的一方"

耶鲁公开课 - 美国内战与重建课程节选

it's very difficult when one is so articulate and is able to express exactly what you want to say,

当一个人已经熟谙一门语言，能够用这门语言清楚明白地表达意思，

想学好英语吗？ - SpeakingMax英语口语达人

Now if that's what they mean,then--a small observation-- they didn't express themselves very clearly.

如果这就是他们的意思，小小观察一下-,他们并没有把自己表达地很清楚。

耶鲁公开课 - 死亡课程节选

So it's not just knowing what genes or figuring out ways to look at gene expression, it's figuring out how this expression of key genes affects the fate of the individual.

所以我们不仅仅是要了解那些基因能致病,也不仅是要弄明白基因的表达方式,更要搞清楚这种关键基因的表达,如何影响个人命运

耶鲁公开课 - 生物医学工程探索课程节选

This thing's nice because rather than do "if" and "and and" or "or or" and all of this, you can instead enumerate things a little more cleanly, albeit apparently at the expense of more white space.

这个东西是不错的，因为它不用“if“和“and，and“,或者“or，or“所有的这些，你可以用枚举来更清楚地表达它，虽然表面上它用了更多的空格。

哈佛公开课 - 计算机科学课程节选

sometimes it's really hard to, you know, sort of get the idea across.

而且有时候也很难清楚表达我的意思。

教英语 - SpeakingMax英语口语达人

but also very non-affrontively, express a lack of complete knowledge

又不冒犯地表达对某事不完全清楚，

I don't know 课堂 - SpeakingMax英语口语达人

Or you could say "I wonder if" and mean that you really do wonder,

或者你可以用“I wonder if”来表达你的确不是很清楚。

I wonder if 课堂 - SpeakingMax英语口语达人

Let me make this a little bit more explicit by talking about the process of hematopoiesis.

我们来说一下造血的过程,来把表达差异解释得更清楚一些

耶鲁公开课 - 生物医学工程探索课程节选

I'm just not being clear.

我只是没有表达清楚。

耶鲁公开课 - 死亡课程节选