Some centrist Democrats, such as Senator Claire McCaskill of Missouri, also criticized the way the president rolled out the new defense plan, and some questioned the intelligence behind the change in strategy to focus moreon short and mid-range missiles from Iran.

VOA: standard.2009.09.24

It's deliberate that a lot of the examples in lecture are fairly short and bite-size so that you can actually focus on pulling out the key ideas without getting distracted by line and lines of code.

很多的演讲中的例子,是短小的,因此你们可以集中于提取其中的主要思想,而不是被一行行的代码给分心。

哈佛公开课 - 计算机科学课程节选