你有没有在别人面前打呵欠，结果对方也打呵欠？
Have you ever yawned in front of someone, only to have them yawn right back?
研究人员发现，在看别人打呵欠的视频时，用鼻子呼吸的人比用口腔呼吸的人打呵欠的几率要小。
The researchers found that those who breathed through the nose rather than the mouth were less likely to yawn when watching a video of other people yawning.
他还进一步补充说，此前在鼠类身上实验的结果表明，打呵欠是由大脑温度急剧升高引起，而打呵欠后大脑温度又会骤然下降。
A previous study in rats showed that yawning was triggered by rapid increases in brain heat and was followed by a sudden drop in temperature, he added.
应用推荐