他敞开睡衣站着打呵欠。
那天早上没有人有时间打呵欠。
那天也没人有时间打呵欠！
你有没有在别人面前打呵欠，结果对方也打呵欠？
Have you ever yawned in front of someone, only to have them yawn right back?
他已经很多个小时没吃东西了，饿得开始打呵欠。
It was many hours since he had eaten anything and he started to yawn from hunger.
他一边打呵欠，一边张开了一张像烤炉一样大的嘴。
那是一段很漫长的时间，他不得不打呵欠，他太累了。
That is a long time, and he has to yawn himself, he gets so tired.
另一种完全不同的理论认为，打呵欠有助于生命早期肺部的生理发育，但对成年人没有任何剩余的生理功能。
A completely different theory holds that yawning assists in the physical development of the lungs early in life, but has no remaining biological function in adults.
打呵欠会分散注意力，消耗精力，耗费时间。
打呵欠对他们的生理活动状态没有什么特殊的影响。
Yawning did nothing special to their state of physiological activity.
他打呵欠打得下巴关节脱了臼。
打呵欠最关键的诱因就是大脑的温度。
博茨瓦纳，打呵欠的狮子。
Yawning lion, Botswana. By Honour Schram DE Jong of Cuddington, bucks.
我们知道你在想什么：想打呵欠吗？
她张口打呵欠。
猫打呵欠因为它们认识到无事可做。
它打呵欠打得下巴关节拖了臼。
他一觉醒来，边打呵欠边伸懒腰。
打呵欠表示你困了或是累了。
她听讲座时一直在打呵欠。
看到孩子们在打呵欠，她就打发他们去睡觉了。
拂晓时在草坪上，打呵欠的溺水者开端皱眉头。
At the dawn on the lawn the yawning drowned man begin to frown.
拂晓时在草坪上，打呵欠的溺水者开始皱眉头。
At the dawn on the lawn the yawning drowned man began to frown.
他揉揉眼睛打呵欠。
我打呵欠伸懒腰。
一个人打呵欠，你会认为那个人对你的信息厌烦。
A person yawns and you believe that person is bored with your message.
打呵欠使人在不由自主张开嘴的同时，能长长的、深深的吸一口气。
Yawning involves opening the mouth involuntarily while taking a long, deep breath of air.
研究显示，打呵欠也会传染，黑猩猩能从卡通片里“学会”打呵欠。
Yawning is so contagious that chimpanzees can "catch" it from cartoons, according to research.
出去终于到一个乌鸦，将要来到一个停止，迅速地打呵欠然后，打瞌睡。
Finally out comes a crow, Coming quickly to a stop, Yawning and then napping.
出去终于到一个乌鸦，将要来到一个停止，迅速地打呵欠然后，打瞌睡。
Finally out comes a crow, Coming quickly to a stop, Yawning and then napping.
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