Cat's whiskers(胡须) are long. They help cats feel the world. At night, they help cats walk around. Without whiskers, cats can't walk well. They are helpful because cats don't see very well.

    A rabbit has two long ears. They have two important functions(功能). First, long ears can hear small sounds(声音). Second, they help the rabbits lose heat(散热). Rabbits have a high body temperature.

    Tigers hunt(狩猎) in tall grass. Their stripes make it difficult for other animals to see them well. When other animals finally see the tiger, it's always too late(迟的).