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yawn 英 [jɔːn] 美 [jɔːn]
基本释义：
This is a verb which means to open the mouth wide when one is sleepy or bored.
v.打呵欠；张开
n.呵欠；<口>乏味的人（事）
例句：
1.His long boring story made me yawn.
他的冗长的故事听得我直打呵欠。
2.He closed the book, yawned, and went to bed.
他合起书, 打了个呵欠, 然后上床睡觉了。
