复数： yawns
第三人称单数： yawns
过去式： yawned
过去分词： yawned
现在分词： yawning
易混淆的单词： YAWN

A yawn is more contagious than any of these .

打哈欠比任何这些状况都更易传染。

Err , don 't people yawn because they 're bored and / or tired ?

呃，人们打呵欠难道不是因为他们感到无聊或疲劳了吗？

But not everyone is susceptible to the yawn contagion .

但不是所有人都容易受到哈欠传染的影响。

In fact I can feel a yawn coming on now .

事实上我能感觉到现在有一个哈欠即将到来。

Excuse me while I stifle a yawn .

抱歉，我忍住了一个哈欠。