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prior condition;prerequisite
condition precedent
precondition;prerequisite强大的经济是维护一级大国地位的～。A strong economy is a prerequisite for the maintenance of the status as a first-class power./为会谈设置～set (or impose)preconditions for the talks
英汉词典共收录311570条英汉翻译词条，基本覆盖所有常用英文单词的例句及中文翻译，是不可多得的英语学习材料。