A few years ago, we started this kind of "favor war" where one of us would do something kind for the other, such as cleaning up the driveway or building a shed, and next time the other would try to top it with another favor.

几年前，我们开始了这种“人情战”，我们中的一个人会为另一个人做一些好事，比如清理车道或搭建棚子，下次另一个人就会试图用另一个人情来顶上。

youdao

That may be a hint that yawn evolved as a social cue—"time for us all to go to bed".

也许这是打哈欠进化为社交线索的一种暗示——“到我们大家睡觉的时间了”。

youdao

Strong global growth is creating record demand for US exports and providing a critical support for the US economy at a time of heightened domestic risks, figures showed yesterday.

昨日公布的数据显示，在美国国内危机加剧之际，全球经济的强劲增长带来了对美国出口产品的创纪录需求，并对美国经济构成重要支撑。

youdao

And now is the time for all of us to take our share of responsibility for a global response to global challenges."

VOA: standard.2009.09.23

And this is also a good time for us to draw a distinction between mythology and myth.

现在正好让我们做一个区分,弄清楚神话和杜撰故事的区别。

耶鲁公开课 - 旧约导论课程节选

The crucial point here for us is that immortality means not just living a very long time or even an extraordinarily long time, but literally living forever.

这里至关重要的一点是永生,不仅意味着生存很长一段时间,甚至极其漫长的一段时间，而是指永远生存下去。

耶鲁公开课 - 死亡课程节选

And we have to have, probably, nuclear energy also, which is not renewable but can go on for a long time for us to meet all of our energy needs.

NPR: Biofuels and Food Prices

But I think the public needs to prepare for the fact that this is going to take a long time for us to clean up.

WHITEHOUSE: President Obama Makes a Statement on Hurricane Sandy

It is also a time for us to take note of the family and friends in our lives who mean so much to us.

WHITEHOUSE: Taking Care of our Military Families This Holiday Season