People from different classes used to mix very little.

不同阶层的人过去很少交往。

youdao

If multiple agents are used, they should be from different classes.

如果所用药剂不止一种，则它们应是属于不同类别的药物。

youdao

There are 26 contestants to compete in this show. They come from different classes.

现在，让我来介绍一下我们的选手和比赛规则吧！

youdao

The standards in this class are just different from all other classes."

这门课的标准和所有其他的课都不同“

耶鲁公开课 - 死亡课程节选

GARCIA-NAVARRO: The over a dozen women interviewed for this story in Basra from different backgrounds and classes all said essentially the same thing.

NPR: Iraqi Army Eases Militias' Grip on Women in Basra

Gate 1 determines if an asset class is fundamentally different from other asset classes in a portfolio.

FORBES: Basics of Asset Allocation (Part 2 of 2)

Ng said Coursera will submit classes from different disciplines, attempting to establish that Coursera students can win real college credit in a wide range of fields.

FORBES: Coursera Mulls Webcam Exam As A Path To College Credit