So if it's not a cell that's going through division you can't use a retrovirus to express the protein.

如果细胞不在分裂阶段,你就不能用逆转录病毒来表达某个蛋白

耶鲁公开课 - 生物医学工程探索课程节选

You can also use it to express things that you don't want to have happened.

你也可以用它来表达那些你不希望发生的事情。

I wish 课堂 - 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

You can also use the "I didn't" pattern to express that the result was not the same as your intentions.

你也可以用“I didn't”句型来表达事情的结果并不是你的本意。

I didn't 课堂 - SpeakingMax英语口语达人

The "I wonder if" pattern, like it sounds, is used to express the fact that you don't completely know something.

I wonder if”句型，就像字面意思表达的一样，是用来表达你对某事并没有彻底的了解。

I wonder if 课堂 - SpeakingMax英语口语达人

I guess they didn't have our language, they didn't-- they were intuitively halfway there but they couldn't express it, so I think the industry didn't get really started.

我猜当时并没有专业的词汇,他们未能...,他们有想法,却无法表述,所以我认为那只是保险业的雏形

耶鲁公开课 - 金融市场课程节选

The "I'd rather" pattern is used to indirectly express that you don't want to do something.

I'd rather”句型是用来间接地表达你不想做某件事。

I'd rather 课堂 - SpeakingMax英语口语达人

and express that you will not do something by saying "I won't".

通过 "I won't" 来表达你不会做某事。

I will 课堂 - SpeakingMax英语口语达人

That's a lot of the literature of stem cells that you'll read about, taking a particular source of stem cell and nurturing it in such a way that it gains potentials that it didn't have necessarily when it was in the body, or exploiting those potentials that it wouldn't necessarily express.

现在你可以找到很多,有关干细胞的文献中讲到,提取一种特定来源的干细胞,通过特定的培养方法之后,它们会获得在体内不能获得的潜能,或者开拓一些在体内不能得到表达的潜能

耶鲁公开课 - 生物医学工程探索课程节选

It turns out we can express all these functions in terms of G, G we wouldn't need to choose G, but it's a very useful function to choose.

最终我们能把所有的这些函数,用自由焓G表示出来，我们没有必要选择，但是这个选择很有用。

麻省理工公开课 - 热力学与动力学课程节选

Another situation where you would use the "you have to" pattern is when you express what you don't have to do.

另一种使用“you have to”句型的情况是要表达那些不需要做的事情。

have to 课堂 - SpeakingMax英语口语达人