求一片英语短文的意思?

题目

求一片英语短文的意思?
CAN you remember a morning when you’ve woken up to the ring of your alarm clock and wished you could stay in bed?You haven’t slept well,your eyes are bleary and your hair is a mess.Worse,you can’t stop yawning.Yawning is universal to humans and many animals.Cats,dogs and fish yawn just like humans do!Yawning is an involuntary (无意识的) action during which you open your mouth and breathe deeply.The average duration of a yawn is about 6 seconds.The purpose and cause of yawning are still a mystery.Scientists are not sure what causes a yawn.People yawn when they are tired or bored,but they also yawn when they aren’t.There are many ideas explaining why we yawn.One idea is that yawning is a way for the body to become more alert by taking in more oxygen.A yawn increases the heart rate,forces carbon dioxide out of the lungs (肺) and bloodstream,and brings oxygen to the brain.But one study showed that volunteers given a lot of oxygen did not yawn any less than before,while those giv

答案

你记得那个当您被你的闹钟铃声吵醒但希望仍可以躺在床上的早晨吗?你还没睡得好,你的眼睛是朦胧的,你的头发是一团糟.更糟的是,你不能停止打呵欠.打哈欠是对人类和许多动物普遍的.猫、 狗、 鱼打哈欠就像人一样 !打哈...