Article in English: The best and most reliable way to make sure you’re purchasing real Gucci sunglasses is to buy directly from a Gucci store. This way, there will be no doubt or need to check the sunglasses to make sure that they’re real. Not every area has a Gucci store, but Gucci does have a store that you can purchase from directly online. If ordering from Gucci online, make sure that your package has not been opened or tampered with in any way. If you can’t buy directly from Gucci, the next best way to assure that the sunglasses are real is to buy from a reliable retailer. For example, Bloomingdale’s, Neiman Marcus, or Nordstrom are some reliable luxury department stores that sell Gucci products. These department stores are sometimes found in standalone locations, but often they are found in malls. If you must buy from an online retailer that is not Gucci or an upscale department store, then make sure a return policy is offered. Only buy the sunglasses if there is a conditional return policy, and if the seller is trusted and has good ratings. This will give you the chance to inspect the sunglasses for authenticity before deciding to keep or return them. You will often see street vendors selling what they claim to be “luxury” items on busy streets. More often than not, the goods will be fake. You can tell this by the price of the products and by a quick inspection. Unless you are okay with fake goods, avoid street vendors. Gucci sunglasses are known for being notoriously expensive. The price is usually at or above $200. It's unlikely that an authentic pair of sunglasses will be much cheaper than that price.

Summary in Chinese:
从Gucci专卖店购买。 从高档零售店购买。 确保网上商店有退货政策。 不要向街头小贩购买。 检查价格。