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打哈欠 yawn [英][jɔ:n] [美][jɔn] 中英文对照：我们为什么打哈欠？ 打呵欠是一种无意识的行为，使我们开大我们的嘴和深呼吸。我们打哈欠时，肺中氧含量低。研究表明，在正常呼吸的状态下，我们不需要使用肺容量。当肺泡需要新鲜的空气，或者当肺泡疲倦了一点的时候。大脑指挥系统会促使身体叹息，或采取一个哈欠来获得更多的空气进入肺部。 Why do we yawn? Yawning is an involuntary action that causes us to open our mouths wide and breathe in deeply. We yawn when oxygen levels in our lungs become low. Studies show that during normal breathing we don't use anywhere near lung capacity. The air sacs or alveoli needs fresh air or else they tend to stiffen up a bit. Therefore it is believed that the brain prompts the body to either sigh or take a yawn to get more air into the lungs. 中英文例句 She yawned, and stretched lazily... 她打了个哈欠，伸了个懒腰。 They looked bored and yawned at the speeches. 他们看起来已经厌倦了这些演讲，直打哈欠。 Did you just make yourself yawn? 你是不是也打呵欠啦? Do not yawn when I am talking with you. 我跟你说话的时候别打哈欠。 We often yawn right after someone else yawns. 我们往往会在别人打呵欠之后马上打呵欠。 |
