youdao

The researchers asked them if they napped and for how long.

研究人员询问他们是否午睡以及午睡多长时间。

youdao

The crucial question is how much oil will be lost, and for how long.

关键问题是损失了多少油以及还会损失多久。

youdao

And mixed economic signals continue to call into question how long it will take for the country to emerge from recession.

VOA: standard.2010.01.06

As time increases, the angle increases and we can ask, "How long does it take for the particle to come back to the starting point?"

这个角度随着时间在增加,我们会问,"质点需要多长时间,才能转到起点"

耶鲁公开课 - 基础物理课程节选

" And-- "How long are you going to stay happy for?"

你们的快乐会持续多久“

哈佛公开课 - 幸福课课程节选

We wanted to investigate to find out who knew what, when, and for how long.

CNN: IRS scandal needs more than a scapegoat

What cannot easily be known is what it was beforehand, and for how long.

ECONOMIST: The arrow of time

Research results are all over the place, depending on which patients are studied and for how long.

FORBES: Medicare Vouchers Won't Reduce Health Spending