他们想介绍一个新品牌。

They want to introduce a new brand.

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每个月这本杂志都会用不同的方式介绍一个新的话题，比如通过文章，实验或是其他创意。

Every month the magazine introduces a fresh new topic with articles, experiments and creative things.

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今天，我要给大家介绍一个活泼的女孩。

Today, I'd like to tell you about a lively girl.

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As every time we introduce a new programming concept, we'll relate it back, as we have been doing consistently, to defensive programming.

我们每次介绍一个,新的编程概念的时候，就会和以前讲的联系起来，就和我们介绍防卫性程序设计一样。

麻省理工公开课 - 计算机科学及编程导论课程节选

And then, if we have time at the end, we'll introduce one last topic, which is isoelectronic atoms and ions.

最后，如果有时间的话，我们将再介绍最后一个主题：,等电子原子与离子。

麻省理工公开课 - 化学原理课程节选

And I want to share with you couple of studies-- I'll share one study and then another later-- about the environment.

我想介绍两个研究-,先说第一个再说第二个，关于环境。

哈佛公开课 - 幸福课课程节选