概念介绍：使用Ajax改进您的站点。

Introducing the concept: Retrofitting your site with ajax.

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以下部分根据上面提到的“确认”追溯概念介绍需求的追溯关系。

The following sections focus on the traceability of requirements in terms of the "Validation" traceability concept noted above.

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美国猫狗度假村在六年前将‘免费寄宿笼’的概念介绍到内华达南部。

The America Dog and Cat Resort introduced the concept of cage-free boarding to Southern Nevada over six years ago.

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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

PROFESSOR: Last time, Professor Guttag introduced the idea of objects and classes and this wonderful phrase called object-oriented programming.

教授：上节课，Guttag教授,介绍了对象和类的概念以及,面向对象编程这个美妙的短语,这是我今天想继续讲的一个话题。

麻省理工公开课 - 计算机科学及编程导论课程节选

So how do we get you from for many of you zero to 60 miles per hour after just 11 weeks, well like many courses here is the course structured around not only lectures for conceptual introductions, but sections, office hours and walkthroughs.

十一周后,很多人每小时都能知道60公里内发生的事情，就像这里的很多课程一样,这个课程不只有概念性的介绍，也包括上机和演练讲座。

哈佛公开课 - 计算机科学课程节选