一项大规模行动持续3周以从海床寻找残骸。

For three weeks a big operation went on to recover the wreckage from the sea bed.

《柯林斯英汉双解大词典》

他们被要求从城市四周的炮兵阵地上撤退。

They were asked to pull back from their artillery positions around the city.

《柯林斯英汉双解大词典》

工作人员从监狱的主体区域撤了出来，但封锁了监狱四周。

Staff withdrew from the main part of the prison but secured the perimeter.

《柯林斯英汉双解大词典》

So I thought I'd begin with a short note that one of your classmates sent to me earlier this week.

我从这周早些时候,你们其中一个同学给我的一张字条开始。

哈佛公开课 - 计算机科学课程节选

And five weeks less one day later I decided you know what this might actually be for me and I switched from pass-fail to letter graded status at that point in time.

而第五周的最后一天,我从上及格-不及格制的课程转为上数字学分制的课程,你们可能知道这对我来说意味着什么。

哈佛公开课 - 计算机科学课程节选

We'll start with Week 2 talking about Genetic Engineering; what's DNA, how can it be manipulated, how is our ability to manipulate DNA led to things like gene therapy which can now be done in people.

从第二周开始我们会讲基因工程,什么是DNA,怎么样才能操控它们,我们如何操作DNA,并将它应用于人类的基因疗法

耶鲁公开课 - 生物医学工程探索课程节选