On the day of the bombings, which crippled the transportation system for weeks, bicycle shops sold out of their stock within hours.

就在爆炸事件发生当天，在短短几个小时之内，自行车商店的存货一抢而空，这次爆炸使伦敦的交通系统瘫痪了几个星期。

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He said the technology would offer distinct advantages over the traditional classroom system, where students often wait days or weeks for grades.

他说，与传统的课堂系统相比，这项技术有明显的优势，因为在传统的课堂系统中，学生往往要等上几天或几周才能拿到成绩。

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System test scenario execution for new functionality only occurred during weeks 5 and 6.

对于新功能的系统测试场景的执行只发生在第5和6周。

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In early July, the company gathered a diverse group of smartphone users and asked them to use a different phone operating system for two weeks.

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Mr Brown has been calling for a global summit for weeks, emboldened by international acclaim for his plan to rescue Britain's banking system.

ECONOMIST: The global economic summit

Lynch said his downtown facility now has a generator system robust enough to power the entire building for three weeks, including the air conditioning.

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