你可以给一个因饥饿而打哈欠的可怜孩子一个便士吗？
Will you be kind enough to give a penny to a poor boy who is yawning from hunger?
很多实验证据证实了打哈欠的另一个不同的功能，它能让我们做好准备，改变活动状态。
The empirical evidence, such as it is, suggests an altogether different function for yawning—namely, that yawning prepares us for a change in activity level.
不幸的是，少数针对打哈欠的科学调查未能发现人们打哈欠的频率与他们睡觉时长和疲劳程度之间有任何联系。
Unfortunately, the few scientific investigations of yawning have failed to find any connection between how often someone yawns and how much sleep they have had or how tired they are.
另一项实验表明，体育运动——尤其是剧烈的运动——可以使呼吸频率增加一倍，但这对打哈欠的频率没有影响。
Another experiment demonstrated that physical exercise, which was sufficiently vigorous to double the rate of breathing, had no effect on the frequency of yawning.
她打哈欠是对我打哈欠的条件反射。
这是那个东西打哈欠的地方。
爱打哈欠的宝宝——你可以打开她的嘴巴喂她喝水。
当我们看到别人打哈欠的时候，我们也会跟着打哈欠。
已经有许多不同的理论，试着去解释打哈欠的原因和目的。
There are various theories that attempt to explain the cause and purpose of yawning .
当他将纯氧注入实验对象时，他们打哈欠的频率并没有发生什么变化。
When he pumped pure oxygen into subjects, for example, their frequency of yawning did not change.
自2007年起，盖洛普就在人类和许多会打哈欠的动物身上验证了这一想法。
Since 2007, Gallup had tested the idea in both animals—many of which also yawn—and people. (Read "Beyond the Brain" in National Geographic magazine.)
看到别人打哈欠的时候，你也会想打哈欠。最近的研究显示，笑会造成模仿行为。
Just as watching someone yawn can induce the behavior in yourself, recent evidence suggests that laughter is a social cue for mimicry.
当别人一边听你侃侃而谈一边打哈欠的时候，你认为这是因为他们缺乏睡眠造成的。
You think that when people around you yawn, it's because they didn't get enough sleep.
研究人员发现，在冬天，一半参与者都会打哈欠，而在夏天打哈欠的受试者只有25%。
The researchers found that half of the participants yawned in winter while only a quarter yawned in summer.
像小孩子一样喜欢活生生的大自然而不是令人打哈欠的书本。这个假期我回家了。也许和你一样。
I love festival when I am in school , you know , children all love vivid nature instead of boring books.
据英国《每日邮报》报道，研究显示，有一半的研究对象在冬天打哈欠，在夏天打哈欠的仅有四分之一。
The researchers found that half of the study participants yawned in winter while only a quarter yawned in summer.
他们发现，马上要打哈欠的那一刻，脑部温度达到峰值，然后就开始下降，最后快速降到打哈欠以前的温度。
The team discovered that brain temperature spikes in the run-up to a yawn, then starts to decline, and finally falls rapidly to pre-yawn temperature.
另一方面，发烧的人打哈欠的时间比身体正常的人少，而控制不住地重复打哈欠可能是糖尿病或中风的症状。
On the other hand, someone running a fever indulges in such ACTS less than normal, while uncontrollable repeats may be a symptom of diabetes or a stroke.
他们统计这些动物打哈欠的时长，然后将其与各物种的大脑平均重量以及大脑皮层神经元的数量进行比较。
They timed all those yawns -and then compared them to each species' average brain weight, and the number of neurons in the cerebral cortex.
主持安这项研究的安德鲁·盖勒普博士说，大脑过热就会导致嗜睡情绪，这就解释了为什么人们昏昏欲睡时也会打哈欠的原因。
Dr Andrew Gallup, who led the research, said having an overheated brain could cause feelings of drowsiness, explaining why we also yawn when we are sleepy.
很长一段时间，人们都相信打哈欠是因为血液里二氧化碳太多而氧气不足，大脑茎干觉察到这点于是触动了打哈欠的神经。
It was long believed you yawned when there was too much carbon dioxide and not enough oxygen in your blood. A part of your brain called the brain stem detected this and triggered the yawn reflex.
然而，现在29条狗看了一个人打哈欠之后有72%也会打哈欠的事实证明人类最好的朋友对于感染人类的哈欠高度敏感。
It turns out, however, that man's best friend is highly sensitive to catching human yawns, with 72 percent of 29 dogs tested yawning after observing a person doing so.
科学家通过对亚利桑那州160名志愿者进行的研究发现，冬季人们打哈欠的几率几乎是夏季的两倍，因为冬季人的体温高于环境气温。
A study of 160 volunteers in Arizona found that people yawned almost twice as much in winter, when their body temperature was higher than the air around them, than in summer.
所以盖洛普和他的同事在网上寻找猫咪打哈欠的视频，他们还找了狗、狐狸、大象、大猩猩、刺猬、松鼠、老鼠以及海象打哈欠的视频。
And so Gallup and his colleagues found themselves hunting for cat videos on the Internet -along with clips of dogs, foxes, elephants, gorillas, hedgehogs, squirrels, rats, and walruses yawning.
我的前齿长得像我祖父，上下齿之间留下一个能打哈欠的空隙。这样的长相在我祖父身上，使他的笑容看上去很和善，也使他的面容显得干瘪。
I had my grandfather's front teeth, betwixt which stood a yawning space that in his smile looked kind and wizened but in mine looked vaguely psychotic and caused a lisp.
疲劳理论的另一个缺陷是，打哈欠并不能像该理论所预测的那样，提高警觉性或生理活跃度。
Another flaw of the tiredness theory is that yawning does not raise alertness or physiological activity, as the theory would predict.
有人提出，打哈欠和打嗝可能有助于清理胎儿的气道。
It has been suggested that yawning and hiccupping might serve to clear out the fetuses airways.
也许这是打哈欠进化为社交线索的一种暗示——“到我们大家睡觉的时间了”。
That may be a hint that yawn evolved as a social cue—"time for us all to go to bed".
也许这是打哈欠进化为社交线索的一种暗示——“到我们大家睡觉的时间了”。
That may be a hint that yawn evolved as a social cue—"time for us all to go to bed".
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