狼是某些大动物的天敌，比如：鹿和野牛。它们也吃兔子、老鼠和野果。
Wolves are natural enemies of some large animals, such as deer or bison. They also eat rabbits, mice, and wild fruit.
当猫发现的时候，它发誓在以后的岁月里老鼠将是它的天敌。
When he found out, the cat vowed to be the rat's natural enemy for ages to come.
小老鼠挠了挠头，他记起来了：“猫虽然看着温和，却是自己的天敌。”
Thee little mouse scratched his head, he remembered: "although the cat looked gentle, but it is their natural enemies."
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