介紹:

rip off 宰人; 坑人

The price is a rip off, so I never buy anything from that shop.
那的價格很坑，所以我從來不在那家店買東西。

coupon 優惠券

You can collect points from the soda bottles and use them to get discount coupons.
你可以從汽水瓶上收集點數，然后去兌換打折優惠券。

free shipping 包郵
Many stores offer free shipping if you spend a certain amount.
如果你購買了一定量金額的東西，許多店都會包郵。

return policy 退貨政策

Not all the shops offer free return shipping, so you have to know a retailer’s return policy before buying their products.
不是所有的店都會給你免退貨運費，所以你得在買商品之前了解清楚店家的退貨政策。

loyalty program 會員計劃

If you join our loyalty program, you could earn some money back on your purchases.
如果你加入我們的會員計劃，你買東西時就會得到一些返現。

shopping cart 購物車 special deal 特價商品 price difference價差

There's often a price difference between an online store and a physical store.
網店和實體店往往會有價差。