ABOUT SHOPPING CART

A user experience designer could help to improve a person's experience with just about anything—a doorknob, a faucet, a shopping cart.

用户体验设计师可以帮助改善人们体验几乎任何事物——一个门把手，一个水龙头，一个购物车。

Often, users are issued a session IDs that can be used later to recall a particular application state (think about shopping a cart application that has to remember what's in the cart).

通常，签发给用户一个会话id，以后，用户就能够使用这个ID恢复特定应用程序的状态(考虑购物的情形，购物车应用程序需要记住车内都有哪些物品)。

A shopping cart needs to make sure that customers can't pick their own prices, that customers can't see information about other customers, and so on.

购物车需要确保顾客不能自己定价，而且顾客不能查看有关其他顾客的信息等等。