Yawning may help you keep a cool head-literally, a new study suggests.

打哈欠也许可以帮你保持头脑清醒——一项新的研究如是说。

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Yawning might eventually help doctors diagnose developmental disorders. The work could also lead to a better understanding of the subtle ways that people communicate and connect.

打哈欠可以帮助医生们诊断孩子们是否发育障碍。这项工作同时有利于人们对人类联系交流的微妙方式，得到更深刻的理解。

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Or extra details that stole your attention, like others’ yawning and fidgeting, may help you assess the speaker’s real impact.

亦即那些转移你注意力的额外细节，比如别人的打哈欠或焦躁行为，可能会帮助你评估说话人所产生的真实的影响。

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The metal moved off of its lows when the dollar came off of its highs, traders said, after hopes emerged that a deal might be struck to help Greece deal with its yawning debt problem.

FORBES: METALS OUTLOOK: Greece, Dollar To Influence Gold Next Week

This was long suspected and may help to nail shut the coffin of a theory that has refused to die: that yawning is about filling the lungs with oxygen or emptying them of carbon dioxide.

WSJ: Matt Ridley on Why You Just Yawned | Mind & Matter