exist: [ ig'zist ] v. 存在词形变化: 动词过去式:existed 过去分词:existed 现在分词:existing 第三人称单数:exists 例句与用法: 1. The Roman Empire existed for several centuries. 罗马帝国存在了几百年。 2. Man cannot exist without air. 没有空气人就不能生存。 3. I can hardly exist on the wage I'm getting; there is no money for luxuries. 我靠我挣的工资简直难以 口,根本无钱享受。 4. That department has ceased to exist. 那部门已不复存在. 英英解释: 动词exist:1. have an existence, be extant同义词:be2. support oneself同义词:survive, live, subsist