🧩 词语组成解析
v. 立基于, 以…为基础（base的过去式和过去分词）
🗣️ 情景例句
He was left in charge of the shop while the manager was away.
经理不在时他负责这个商店。
This week he took his first vacation from work in five years.
五年来，他本周破例第一次休假。
good-tempered elephant who will give many years of loyal service.
脾气温顺、能忠实为人服务多年的大象。