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这意味着，行业劳动力正从提供标准化讲解的“流水线工人”，向提供个性化服务的“旅行策划师”升级，这是产业价值提升最坚实的微观基础。
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High-stakes talks between the US and Iran over the future of Tehran’s nuclear programme ended on Thursday without a deal, as the White House weighs a military operation that would mark its largest intervention in the Middle East in decades.
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the verb form sindon