在这里我已经打了很多场比赛了。

It's been a lot of tennis in this tournament.

youdao

我已经打了，他们派的人马上就会到了。

I already called. They're gonna send somebody over soon.

youdao

我已经打了六个小时的字，真使我精神紧张。

I have been typing for six hours and it is really getting on my nerves.

youdao

What I'm going to do is focus on a couple basic things that turn out to be really important for general applications, and then I'll talk not in too much detail about a few applications of DNA that you're probably familiar with to try to give you a framework to hang this on.

我要重点讲一些基础知识,这些知识在一般应用中十分重要,然后我会简略的讲讲,关于DNA的一些应用,你们可能已经比较熟悉了,我只是试着给你们打一个框架

耶鲁公开课 - 生物医学工程探索课程节选