英汉词典

1.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.

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。

2.A growing body of research now shows that yawning is nature's way of keeping our brains cool.

越来越多的研究表明，打哈欠是一种让大脑保持冷静的自然方式。

3.It might be that yawning helps to clear out the lungs by periodically lowering the pressure in them.

打哈欠可能通过周期性地降低肺部的压力来帮助清理肺部。

4.Yawning may be part of that.

而打哈欠就是其中一部分。

5.No time had been found for yawning that day, either!

那天也没人有时间打呵欠！

6.Volunteers were told to think about yawning while they breathed either normal air, pure oxygen, or an air mixture with an above-normal level of carbon dioxide.

当志愿者在正常的空气中、纯氧的环境下，或者混有超过正常的二氧化碳含量的空气中呼吸时，他们被要求要想着打哈欠。

7.Experiments have also cast serious doubt on the belief that yawning is triggered by a drop in blood oxygen or a rise in blood carbon dioxide.

对于打哈欠是由血液中的氧气减少或血液中的二氧化碳增加引起的这种观点，一些实验也同样提出了严重的质疑。

8.Will you be kind enough to give a penny to a poor boy who is yawning from hunger?

你可以给一个因饥饿而打哈欠的可怜孩子一个便士吗？

9.A completely different theory holds that yawning assists in the physical development of the lungs early in life, but has no remaining biological function in adults.

另一种完全不同的理论认为，打呵欠有助于生命早期肺部的生理发育，但对成年人没有任何剩余的生理功能。