91 马的耳朵为什么时常摇动？

马摇动耳朵是为了表达情感。
often adv. 常常
We often take a walk after dinner.
我们常常饭后散步。
tired adj. 疲劳
My arms are tired.
我的胳膊累了。
game n. 游戏
It's a cat-and-mouse game to him.
对他来说就是猫捉老鼠的把戏。