conclude ，aver,declare （动词）断言； claim（名词）断言'The situation in the inner cities is bad and getting worse,' she concluded.“内城的情况很糟，而且是越来越糟。”她断言道。He claimed that it was all a conspiracy against him . 他断言这一切都是一场针对他的阴谋。British experts delivered a strong counter-blast to the Professor's claims. 英国专家对该教授的断言进行了强烈驳斥。He avers that chaos will erupt if he loses. 他断言，如果他失败将会爆发动乱。
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