非洲象站着睡，猫头鹰睡觉睁一眼闭一眼，松鼠把尾巴当被子盖。How about other animals? 我睡觉有一个固定的姿势：一只耳朵贴着地面。Why? Because I can hear better this way. 地面的传声效果比空气好！As soon as my owner gets up, I can hear his footsteps. We migrate in groups every year. We fly from north to south...