探险家在三周内完成了这次航行。

The explorer accomplished the voyage in three weeks.

不过这些改变在三周内还看不出来。

These changes were not evident at three weeks.

75%的坐骨神经痛会在三周内不治而愈。

Sciatica resolves on its own in three weeks in 75% of cases.

网上申请后材料是否必须在三周内到达研究生院？

Supporting documents should reach the University preferably within three weeks after submission of the on-line application.

受试者接受了设备使用培训以及在三周内如何每晚在家使用的相关指导。

Participants were trained on the use of the equipment and instructed to use it at home each night for three weeks.

他们很乐意立刻补给你，并会尽快处理你的请求，在三周内送达你的缺件。

We'll deal with your request as quickly as possible and your replacement parts should arrive within three weeks.