三周后，我母亲好转了。

After three weeks, my mother got better.

youdao

格林小姐将在三周后回到家乡。

Miss Green will go back to her hometown in three weeks.

youdao

他学会了如何使用假肢，手术三周后，他就能走路了。

He learned how to use an artificial leg, and three weeks after the operation, he was walking.

youdao

John Landy Six weeks later, John Landy, the Australian runner, runs the mile in 3 minutes 57.9 seconds.

六周后，澳大利亚跑手，一英里跑了三分57。9秒。

哈佛公开课 - 幸福课课程节选

He came back, and with him he brought the Uncertainty Principle.

三周后他回来了，和他一起的还有测不准原理。

麻省理工公开课 - 固态化学导论课程节选

Starting at the beginning of the third week of class that is not next week but the week after on each Monday I'm going to put up a brief question or set of questions, which you have to answer and your answers need to be sent to your teaching fellow.

本课程将于开学后三周开课,也就是自下下周开始,每周一上课,我会提出一系列问题,要同学们思考并回答,大家的答案要在周五前交给研究生助教

耶鲁公开课 - 心理学导论课程节选