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I will not believe it unless and until he tells me so.
除非他亲口对我说,否则我决不相信.
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Normal people tend to forget this process unless and until they are reminded of it.
衰老的过程,不经提起,正常人容易忘记;一经提醒,才会记起.
英汉双解词典包含4367426条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。