贫困是顽疾，“顽”在成因复杂、难以根除、极易反复。
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。关于这个话题，爱思助手下载最新版本提供了深入分析
Although it has been widely alleged - by politicians, police and protesters - that organised groups and infiltrators acting on behalf of political interests helped drive the destruction, we have found no evidence to substantiate the claim.。关于这个话题，旺商聊官方下载提供了深入分析
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美國總統特朗普（Donald Trump，川普）向國會發表了他任內最長的一次演說——長達1小時47分鐘——並告訴美國立法者，「國家再次開始勝利」，同時強調其政府的成就。