Over several weeks, there were quite a few false fire alarms.

在过去的几周里，发生了不少火警误报。

youdao

They usually disappear over several weeks and do not recur.

结节常在数周后自然消退，复发不常见。

youdao

Stay at the lower end of the scale (11-13) and build up over several weeks.

保持在评测表较低的水平(11 - 13)，几周后再逐步提升。

youdao

Details of the discussion were not released. The president's press secretary, Robert Gibbs, says this is the second of five such meetings to be held over several weeks, to determine the best course in Afghanistan.

VOA: standard.2009.10.01

"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

Firstly, the points she raised have been pursued relentlessly in the chamber over several weeks.

BBC: First minister's questions

This causes your thyroid gland to shrink, and problems lessen gradually, usually over several weeks to several months.

CNN: Graves' disease

The US attorney's office released a 76-page FBI affidavit detailing the charges against Mr Blagojevich, which included transcripts of his telephone conversations intercepted by court-authorised wiretaps over several weeks.

BBC: Illinois moves against governor