跨境电商实用英语第二版Unit 3的答案如下：1. What is the biggest challenge for cross-border e-commerce companies? – The biggest challenge for cross-border e-commerce companies is the complex logistics and customs procedures.2. How can cross-border e-commerce companies overcome the challenge of complex logistics and customs procedures? – Cross-border e-commerce companies can overcome the challenge of complex logistics and customs procedures by partnering with reliable logistics providers who have expertise in global shipping and customs clearance.3. What are some popular payment methods in cross-border e-commerce? – Some popular payment methods in cross-border e-commerce include credit cards, PayPal, and international money transfer services.4. How can cross-border e-commerce companies build trust with international customers? – Cross-border e-commerce companies can build trust with international customers by providing secure payment options, offering transparent shipping and return policies, and displaying customer reviews and ratings on their website.5. What are the advantages of using social media for cross-border e-commerce? – Using social media for cross-border e-commerce allows companies to reach a wider audience, engage with potential customers, and build brand awareness in different countries.希望以上答案可以帮助学习者更好地掌握跨境电商领域的英语知识。

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