题目：请将以下英文句子翻译成中文：“Cross-border e-commerce operators should constantly adapt to the changing market demands and optimize their supply chain to enhance operational efficiency.”参考答案：跨境电商运营商应不断适应市场需求的变化，优化供应链以提高运营效率。

       解析：该题目涉及跨境电商运营中的重要概念和技能。

       首先，要理解“cross-border e-commerce operators”指跨境电商运营商；其次，要明白“constantly adapt to the changing market demands”的意思是不断适应市场需求的变化；最后，要理解“optimize their supply chain to enhance operational efficiency”，即优化供应链以提高运营效率。

       综上所述，翻译应该是准确、简洁、理解完整的。

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