1.
The act of yawning.
打哈欠打哈欠的动作
2.
Yawning is often contagious.
打哈欠常易于感染。
3.
To stare or gape stupidly.
愚蠢地盯着或打哈欠
4.
He says almost anything connected with yawning can make people yawn.
他说几乎任何和打哈欠有关的事都能使人们打哈欠。
5.
It is also believed that watching someone else yawn will cause you to yawn too.
此外，人们还认为看到别人打哈欠，自己也会开始打哈欠。
6.
It is also beleved that watching someone else yawn will cause you to yawn too.
此外，人们还认为看到别人打哈欠，自己也会打哈欠。
7.
Now, it is simply considered rude not to cover your mouth when you yawn. It is also believed that watching someone else yawn will cause you to yawn too.
（现在，打呵欠时不掩嘴却只被视为无礼，而且据说看见别人打哈欠，自己也会想打哈欠。
8.
He said there is some evidence that yawning is linked to excitement.
他说有证据说明打哈欠与兴奋联系。
9.
Do you ever wonder why you yawn?
你曾经想过你为什么打哈欠吗？
10.
He yawned and stretched (himself)
他一面打哈欠一面伸懒腰。
11.
I wonder if hearing it may make you yawn.
我想知道在听它时你是否打哈欠了。
12.
A toad yawns/a gaping mouth(talking Big)
癞蛤蟆打哈欠,好大的口气
13.
He smothered a yawn behind his hand.
他用手挡住嘴遮掩自己打哈欠。
14.
Then Alice yawned and stretched.
接着，爱丽丝打哈欠，伸展身体。
15.
A yawn is an instinctive behavior: You don't have to learn to do it, and yawns are even present before birth.
打哈欠是人的本能行为：你不需要去学它，甚至在我们出生之前我们就已经学会打哈欠了。
16.
He says yawning seems linked in some way to sleeping.
他说从某方面上看打哈欠似乎与睡眠有关。
17.
Students also kept records of when they yawned throughout the day.
学生们还记录下全天中他们何时打哈欠。
18.
Yawning is common among runners waiting to begin a race.
打哈欠在赛跑运动员等候比赛开始时很常见。