He enrolled in four classes during his first semester at TCU.

小休伊第一学期就选报了四门课。

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Half of the students in four large philosophy classes read an article on the ethics of factory-farmed meat, optionally watched an 11-minute video on the topic and joined a 50-minute discussion.

在四节大型哲学课上，一半学生阅读了一篇关于工厂化养殖肉类的伦理文章，非强制性观看了一段11分钟的视频，并开展了50分钟的讨论。

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The four Ps concept is explained in most marketing textbooks and classes.

大多数市场营销教材和课堂都会阐释四个P的概念。

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And so you are really good friends with like all the people you're in class with, because you know them since like four years and you have all classes together with them."

VOA: special.2009.11.05

The advice-less 401(k) holder is invested in less than four asset classes, the Schwab study found, while advice-receiving investors are in a minimum of eight asset classes.

FORBES: Advice Is Critical To 401(k) Investing

The project seeks to incorporate MIL through extra curriculum classes in four Jordanian governorates (4 schools).

UNESCO: OFFICE IN AMMAN

MatchLive is organizing salsa-dancing mixers, walking tours and cooking classes in four major cities, including Chicago and Los Angeles.

FORBES: Sex and the City