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

Within the first 20 minutes of the film, Adam misses just about every social cue imaginable.

在影片的前二十分钟，亚当违背了所有可以想到的社交要点。

youdao

Just as watching someone yawn can induce the behavior in yourself, recent evidence suggests that laughter is a social cue for mimicry.

看到别人打哈欠的时候，你也会想打哈欠。最近的研究显示，笑会造成模仿行为。

youdao

One way takes a cue from social inspiration board Pinterest and mobile technology.

FORBES: Retailers Fight Back Against Amazon With Private Brands

We'll tell you the crazy number of times "Angry Birds" has already been downloaded on other platforms and how the new version will be taking a cue from "FarmVille" and other social games.

CNN: Tech Check: iPhone privacy, even angrier birds

Holder also argues that other movements for social change -- the feminist and antiwar movements most notably -- took their cue from the noble efforts of often unsung black Americans who gave their lives unselfishly to improve the lot of their brothers and sisters, and thus, the lot of the nation.

CNN: Commentary: Holder wants to tear down wall of race