Advanced Placement is a program of college-level classes and tests.

VOA: special.2010.12.30

And class size is pretty small if you go up to, you know, advanced level classes.

班级挺小的，如果，你知道，你去上高级课程的话。

要考入大学 - SpeakingMax英语口语达人

On one level, there are things like companies that have two . different classes of stock that are economically identical.

一方面，我们有这样的例子，有的公司拥有两种,不同类别的股票，他们在经济意义上是相同的。

耶鲁公开课 - 金融市场课程节选

But the regular classes, their level is lower than in Turkey."

VOA: special.2009.11.05

The first level it will be taught as any other class in psychology or any of the classes you've taken here.

第一部分会和其他心理学,或者其他任何课程一样。

哈佛公开课 - 幸福课课程节选

You have to limit your exposure to risky asset classes to a level that allows you to sustain those positions even in the face of terribly adverse market conditions.

你必须把手中持有的风险资产,限制在一个合适的比例水平,并且即使到了最差的市场环境下,你依旧能够承受这些风险资产

耶鲁公开课 - 金融市场课程节选