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”。
Global warming could bring disastrous effects to Earth, so it is high time for us to protect our earth.
全球变暖可能给地球带来灾难性的影响，我们是时候应该保护地球了。
It's time for us to express our nostalgia for this great writer.
是时候表达我们对这位伟大作家的怀念了。
Many wild animals are in danger, so it's time for us to do whatever we can to protect them.
许多野生动物处于危险之中，所以是时候让我们尽我们所能来保护它们了。
I do think it is time for us to understand the importance of protecting the environment and do something about it.
我确实认为我们是时候了解保护环境的重要性，并为之做些什么。
As a hint that it was time for us to go, Mr. Brown looked at his watch.
布朗先生看了看手表，示意我们应该动身了。
But I wouldn't gloss over the fact that that was a tough time for us.
但我不会掩饰这个事实：那对我们都是段难熬的日子。
Some people would argue that the time for us to hide behind our masks is over.
有些人会说，让我们隐藏在面具之后的时代结束了。
The prime time for TV channels is also the prime time for us to do our homework.
电视台的黄金时段正是我们做功课的时间。
It's high time for us human beings to take quick action to protect water resources.
对我们人类来说，到了迅速采取措施保护水资源的时候了。
Holiday would be a good time for us to travel with parents, just like the old time.
节假日是我们和父母去游玩的好时节，就像旧时光那样。
The final examination is coming up soon. It is time for us to get down to our studies.
期末考试不久就要来了，我们该开始认真学习了。
Spring has come and it is about time for us to go out and enjoy the beautiful scenery.
春暖花开，又该是我们出游享受风景的好时机了。
Since we had recently switched insurance plans, it was time for us to look for a new doctor.
由于我们最近更换了保险，所以我们必须找一个新医生。
"When we go through a crisis like this, it's a time for us to improve everything," Shiller said.
“我们经历了这样的危机，是时候让我们改善一切了”Shiller说。
I think it is time for us to lay down our face, live the way we are, don't live in other's eyes.
我认为是时候该放下我们的面子，活出自我，不要活在别人的眼光里。
Now we know how to setup Jython and connect to DB2. It is time for us to rock'n roll with examples.
现在，我们已经知道如何安装Jython和连接DB2，应该开始查看示例了。
Is there adequate time for us as a human family to make the transition to compassionate vegan living?
还有足够的时间让我们人类大家庭转向慈悲的纯素生活吗？
Now, what are we waiting for? It's time for us to strive for our bright future, for our bright forties.
现在，我们还在等什么？是时候去为我们光明的未来，辉煌的四十岁奋斗了。
Now is simply not the time for us to be sidetracked from what we need to do right now to protect public health.
现在还不是我们该分散注意力时候，我们现在迫切需要把注意力放在保护公共卫生上。
It is time for us to let the world know about all the good things that we have accomplished over so many years.
此刻该是我们让全世界知道多年来我们所成就的好事的时候。
And maybe, it's time for us to realize that we should protect the earth, stop cutting down trees blindly and madly.
也许，是时候我们应该保护地球，停止盲目疯狂地砍伐树木了。
We should learn from other people's mistakes, since there's not enough time for us to make all the mistakes ourselves.
我们应该从他人的错误中吸取教训，因为我们根本没有足够的时间，让自己去犯所有的错误。
It took a long time for us to believe that this change we're noticing in our climate was due to human activity; very hard to believe.
我们花了很长时间去相信气候变化是由于人类的行为所致；很难让人接受。
It took a long time for us to believe that this change we're noticing in our climate was due to human activity; very hard to believe.
我们花了很长时间去相信气候变化是由于人类的行为所致；很难让人接受。
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