It was not new; he had felt it for weeks.

VOA: special.2009.06.27

Realize that there's this wonderful mechanism in place that allows you to put your toe in the water for several weeks no less and then get a sense, and then decide whether or not this is something for you.

要知道这种好的评分体制哈佛也有,在这种机制下你可以先试听几周,熟悉这一机制，然后再决定这是否适合你。

哈佛公开课 - 计算机科学课程节选

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

She says she does not understand why weeks of meetings are needed in order for the U.S.government to make a decision.

VOA: standard.2009.11.09

"It's not just about surviving an operation and doing well for a few days or a few weeks.

VOA: standard.2010.01.01

But the torrential rains have not stopped. They are expected to continue for several more weeks, enough time to add to the already extensive damage that has occurred.

VOA: standard.2009.09.05

The list of reasons why teams coming from abroad were not thrilled at the prospect of several weeks in Nigeria for this year's Under-17 World Cup is long.

VOA: standard.2009.11.05