研究称：“她们表现出乐观、冷静和同情，即使这些情绪并不是她们实际感受到的。”
"They expressed optimism, calmness and sympathy even when these were not the emotions that they were actually feeling," the study said.
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。
A growing body of research now shows that yawning is nature's way of keeping our brains cool.
利用数学、体育等多学科的研究成果，Beilock(贝洛克)发现如果得力于练习与积极的意识，可以使大脑保持冷静。
Drawing on studies for everything from math anxiety to sports, Beilock found that the brain keeps its cool with a combination of practice and positive reinforcement.
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