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256. in the event of(=in case of)万一，即使发生 时 257. except除 以外;besides除 以外还有 258. except(=but)除了 259. except for(=apart from)除 以外 260.(an)exception to 的例外 261. with the exception of(=except，apart from)除去 ，除 以外 262. in excess of(=more than)超过 263. exchange for以 交换 264. exclusive of(=not taking into account;without)不包括 265. in excuse of作为 的借口 266. exert on 对 施加 267. exert oneself to do sth.努力，使劲 268. come into existence(=begin to exist)开始存在;come into use开始使用;come into effect开始运转;come into fashion开始时新;come into action开始行动;come into power开始执政;come into sight进入视野;come into blossom开花; 269.(be)in existence存在come into existence出现 270. expect of 期望 | 
