在冬天，当室外平均温度21度时，45%的人看到别人打呵欠的图片时自己也会打哈欠。
In the winter, when outdoor temperatures averaged 21 degrees, 45 per cent of people responded to the images by yawning themselves.
将冰袋敷在前额上也能起到类似的效果，而在观看视频时用暖水袋或室温水袋敷在额头上的人却无法避免打呵欠。
The same effect was found among those who held a cool pack to their forehead, whereas those who held a warm or room-temperature pack yawned while watching the video.
但是在夏天，当环境温度远高于人体平均温度37度时，看同样图片而产生打呵欠反应的人还不到四分之一。
But in summer, when conditions are much hotter than the average body temperature of 37 degrees, fewer than a quarter yawned.
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.
再没有比对称的格局更令人感到难受的了，因为对称的形象能使人愁闷，愁闷是悲伤的根源，失望的人爱打呵欠。
It is because symmetry is ennui, and ennui is at the very foundation of grief. Despair yawns.
再没有比对称的格局更令人感到难受的了，因为对称的形象能使人愁闷，愁闷是悲伤的根源，失望的人爱打呵欠。
It is because symmetry is ennui, and ennui is at the very foundation of grief. Despair yawns.
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