日期:
来源:雅诚德英语网
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。
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。