字神帝國英語天地

打哈欠： yawn

例句： can't stop yawning - I must be tired.

我不停打哈欠——肯定是累了。

a yawn：乏味的事物（或人）

例句：The film was a total yawn.

這個電影太沒勁了。

為什麼會打哈欠呢？？

１.  Increase focus 提高專注力

Studies have shown that yawning also increases blood pressure, stretches facial muscles, and increases focus. When you pandiculate, you stretch all of your muscles, making them better ready to be used at any moment.

 研究證明打呵欠也會升高血壓、伸展臉部肌肉並增加專注力。當你伸懶腰，你伸展你所有肌肉，讓他們更充分準備好在任何時刻被派上用場。

2. Cool down 冷卻－打哈欠會冷卻大腦，防止大腦過熱

When you are exhausted, tired, deep brain temperatures increase. But your brain is like a computer. It operates best at a very specific temperature. And so, yawning, bringing all this outside air in through your ears and your mouth cools your facial blood and actually helps cool down your brain.

當你筋疲力竭、疲累時，大腦深處溫度升高。但你的腦就像台電腦。它在一個非常特定的溫度下運作得最有效。所以，打哈欠，帶入這外頭全部的空氣穿過你的雙耳和嘴巴，讓你臉部血液降溫，並確實幫助冷卻你的腦袋。