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哈欠基本解释

汉语拼音：hā qian

困倦时嘴张开，深深吸气，然后呼出，是血液内二氧化碳增多，刺激脑部的呼吸中枢而引起的生理现象：打～。

人体血液中二氧化碳增多，刺激脑部的呼吸中枢而引起的一种生理现象。打哈欠时不自觉地张嘴深吸气，然后呼出。
丁玲《韦护》第三章：“他不时要打哈欠，他太缺少睡眠了。” 老舍《四世同堂》二一：“他打了个很长的哈欠，凉风儿与凉的月亮，好象一齐进入他的口中。” 杨沫《青春之歌》第一部第七章：“他深深呼吸了一下从缝隙透进来的寒冷的空气，又打了个哈欠。”

She stretched her arms out and gave a great yawn.
她伸了个懒腰，打了个大哈欠。
She makes no attempt to stifle a yawn.
她忍不住打了个哈欠。
He yawns, not troubling to cover his mouth.
他打了个哈欠，都懒得抬抬手遮一下嘴巴。
Rosanna stifled a huge yawn.
罗莎娜想打个大哈欠，但强忍住了。
She yawned, and stretched lazily.
她打了个哈欠，伸了个懒腰。
He gave an ostentatious yawn.
他张扬地打了个哈欠。
Her yawn was a Pavlovian response to my yawn.
她打哈欠是对我打哈欠的条件反射。
She yawned and looked pointedly at her watch.
她打了个哈欠，又刻意地看了看手表。
John yawned and scratched his chin.
约翰打个哈欠，挠挠下巴。
He stood up, stretched and yawned.
他站起身来，伸了个懒腰，打了个哈欠。
He closed the book, yawned, and went to bed.
他合上书, 打了个哈欠, 然后上床.
Her yawn suggests that she is sleepy.
她打哈欠表示她很困了.
Yawning is often contagious.
打哈欠常易于感染.
The alarm did go off but all I did was yawn, turn over and go back to sleep.
闹钟确实响了，但我只是打了个哈欠，翻个身又接着睡着了。
Crook's eyelids drooped and he yawned.
克鲁克的眼皮耷拉下来，打了个哈欠。