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
"There's a mountain of evidence proving the importance of sex influences at all levels of brain function," he told The Seattle Times.
他在接受《西雅图时报》采访时表示，“大量证据证明，性对大脑各方面功能有影响。”
3
This is evidence that our immune system really doesn't function so well when we age.