For several weeks,the former president has been traveling to many cities to talk about the book.

VOA: special.2010.10.15

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

She was in a coma and was not able to communicate for several weeks.

VOA: special.2010.04.14

But the drug requires many painful injections several times a day for several weeks.

VOA: special.2010.01.04

Some foods can be kept fresh this way for several weeks.

VOA: special.2009.02.09

Mr.Micheletti said the ousted leader and his supporters have been trying to block the November elections for several weeks.

VOA: standard.2009.09.22

Negotiations among the five permanent Security Council member states on a new sanctions resolution have been underway in New York for several weeks.

VOA: standard.2010.05.14

For several weeks in Washington, U.S.President Barack Obama has been hearing counsel from his advisers about the best course to take with the war-torn country.

VOA: standard.2009.11.09

North Korea had been hinting for several weeks that a major missile test was upcoming.

VOA: standard.2009.03.12

After several weeks, it became clear that the Senate would approve President Garfield's choice for the tax collector's job.

VOA: special.2010.04.22

Cluster headaches occur in cycles: sufferers can experience several headaches a day for weeks or even months on end.

VOA: standard.2009.12.17

Geithner said it will take several weeks for his plan to be properly evaluated by financial markets.

VOA: standard.2009.03.24

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

"We know that surface use of dispersants decreases the environmental risk to shorelines and organisms at the surface and we know that dispersants break down over weeks rather than remaining for several years as untreated oil might."

VOA: standard.2010.05.18

The Tea Party express bus tour will make its way to Washington over the next several weeks and plans to arrive in the nation's capital for a rally on April 15, the national deadline day for citizens to file their annual income tax returns.

VOA: standard.2010.03.28