an involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom; "he could not suppress a yawn"; "the yawning in the audience told him it was time to stop"; "he apologized for his oscitancy" 同义词：yawn, oscitance, oscitancy,
showing lack of attention or boredom; "the yawning congregation" 同义词：drowsy, oscitant,
gaping open as if threatening to engulf someone or something; "the yawning mine shaft"; "a yawning abyss"
with the mouth wide open indicating boredom or sleepiness; "a yawning congregation"
例句与用法
1.
He got up with a stretch and a yawn . 他起了床，伸个懒腰并打个呵欠。
2.
She yawned gracefully in my face . 她娇嗔地对着我的脸打了一个哈欠。
3.
He woke up , yawned and stretched . 他一觉醒来，边打呵欠边伸懒腰。
4.
Surreptitiously, peter loaklry yawned . 彼得柯克兰偷偷地打了个哈欠。
5.
She yawns evenly and turns to him . 她不紧不慢地打了个呵欠，向他转过脸来。
6.
He closed the book , yawned , and went to bed . 他合上书，打了个哈欠，然后上床。
7.
He yawned out a good night . 他打着呵欠说明天见。
8.
He blinked, yawned and looked around him . 他眨眨眼睛，打了个呵欠，然后朝四周扫了一眼。
9.
The ten years between them yawned like a hundred . 虽只相隔了十年，他们却感觉象是一百年。
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