免费邮寄特权

例句：

1. 1. We offer free shipping on all orders over $50.
   我们对所有订单超过50美元的提供免费送货服务。
2. 2. The company offers a free shipping discount for customers who spend over $100.
   该公司为在购物金额超过100美元的客户提供免费送货优惠。
3. 3. Many online retailers offer free shipping as a way to attract more customers.
   许多在线零售商通过提供免费送货作为吸引顾客的方式。