你下学期的课已经注册了吗？

Did you register already for your classes next semester?

youdao

艺术课已经开始了。

The art class has started.

youdao

事实上，我已经落下102节课了。

In fact, I have dropped out of 102 class.

youdao

We've been discussing energy diagrams a lot in this class, it's a very good way to visualize exactly what's going on.

在这个课里面，我们已经讨论过很多次能量图了，它通常是一个很好的把所发生的事情形象化的方法。

麻省理工公开课 - 化学原理课程节选

For those of you who have had a course in probability and statistics, there will be nothing new here.

对于已经,学过概率和统计的同学来说,这堂课就没什么新鲜的了

耶鲁公开课 - 金融市场课程节选

There are lots of other people in this course and there have been lots of other people in this course like you.

现在在修这门课的不止你们这些人,也有很多人已经修完了这门课,就像你们一样。

哈佛公开课 - 计算机科学课程节选