i once worked as a waiter

i once worked as a waiter 基本解释

我曾经当过服务员

重点词汇

once adv. 一次，一趟；一倍；曾经；一旦 conj. 一旦…就…；一经 n. 一次，一回

worked work的过去式和过去分词

waiter n. 侍者；服务员；托盘