For this shopping cart, there is a hierarchical Category class and a simple Product class.
对于这个购物车来说，有一个层次Category类和一个简单的product类。
Let me grab a shopping cart and put your car seat in it.
我来推一个购物车，把你的安全座椅放里。
The man took the baby to the supermarket and put him in the shopping cart.
男人戴着孩子去超市，把孩子放进了购物车里。
The shopping cart is interactive and up to date.
购物车是交互式的和最新的。
Click "Buy" and Add to Shopping Cart.
选择购买增加到购物车上。
Click "Buy" and Add to Shopping Cart.
选择购买增加到购物车上。
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