Sequence diagrams can be used to describe the USES of a class or interacting group of classes, thus describing the protocols required for interaction.

序列图可用于描述类或一组相互作用的类的使用，因而描述了交互所需的协议。

youdao

On the way home we shared our first class compartment with a group of businessmen.

在回家的路上我们和一群商人共同乘坐头等车厢。

《柯林斯英汉双解大词典》

Julia Silverman and Jessica Matthews developed the sOccket as part of a group project for an engineering class at Harvard University.

Julia Silverman 和 Jessica Matthews 开发了 sOccket，这是哈佛大学工程课小组项目的一部分。

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Touch of Class is a student singing group at Chantilly High School in Fairfax County,Virginia.

VOA: special.2011.04.01

By combining elements as it were of the few and the many polity is characterized by the dominance of the middle class the middle group.

透过结合一些元素,就像前人所为，结合少数人与多数人,政体的特征便转为是,由中间阶级，中间团体所统治。

耶鲁公开课 - 政治哲学导论课程节选

so it's a 250-person class, but we have a group of 50 that we go around with quite a bit.

这是一门250人的课，但是我们组成50人一组一起学习。

跟校友们的关系 - SpeakingMax英语口语达人

Much rent-seeking is redistributing the surplus of one group of the middle class to another group of the middle class via the government.

FORBES: What Is Rent-Seeking Behavior?

Those sums triggered what became an annual Harvard tradition: first, the disclosure (compelled by tax laws applying to nonprofits) of the HMC bonuses, followed by an outcry led by the late William Strauss and a group of Harvard alumni from his class of 1969.

FORBES: Magazine Article

The long-term aim, however, is to use it to train a group of world-class African sculptors.

ECONOMIST: Rwenzori Sculpture Foundation