1、（给…）提供；端上：serve sth (with sth) / serve sth (to sb) / serve sb sth。
2、够…吃（或用）：This dish will serve four hungry people.这盘菜够四个饿汉吃。
3、接待；服务：Are you being served?有人接待您吗?
4、对…有用；能满足…的需求：These experiments serve no useful purpose.这些实验没有任何实际意义。