介绍:

rip off 宰人; 坑人

The price is a rip off, so I never buy anything from that shop.
那的价格很坑，所以我从来不在那家店买东西。

coupon 优惠券

You can collect points from the soda bottles and use them to get discount coupons.
你可以从汽水瓶上收集点数，然后去兑换打折优惠券。

free shipping 包邮
Many stores offer free shipping if you spend a certain amount.
如果你购买了一定量金额的东西，许多店都会包邮。

return policy 退货政策

Not all the shops offer free return shipping, so you have to know a retailer’s return policy before buying their products.
不是所有的店都会给你免退货运费，所以你得在买商品之前了解清楚店家的退货政策。

loyalty program 会员计划

If you join our loyalty program, you could earn some money back on your purchases.
如果你加入我们的会员计划，你买东西时就会得到一些返现。

shopping cart 购物车 special deal 特价商品 price difference价差

There's often a price difference between an online store and a physical store.
网店和实体店往往会有价差。