The National Association for Sport and Physical Education says twenty to thirty students in a P.E.class should be the limit.

VOA: special.2009.08.06

I will use that to post information, maybe once in a while send an e-mail to the whole class.

我会在那上面发布通知,可能隔一段时间就会给全班群发一封邮件

耶鲁公开课 - 基础物理课程节选

And while I'm at school in class, I can use the e-books of the courses that I'm studying.

在学校上课的时候，我也可以使用那些我修的课程的电子材料。

What kind of实战 - SpeakingMax英语口语达人

Daimler cannot sell more big-margin vehicles such as the E-class, AMG E or the S-Class and SUV's in Europe unless it sells more small models that will allow the company to fall in line with E.

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They might even be more C class than E class, when thinking of the Mercedes Benz line of vehicles.

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Mercedes-Benz has the A-Class E Cell, sold only in Europe, and the B-Class F-CELL, but plans to debut the SLS-AMG E Cell in a battery electric version by 2013.

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