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。
For example, say you have logged in to an online store, added a few items to your shopping cart, and are about to check out and purchase the items.
例如，假设登录到一个在线商店，在购物车中添加了几个商品，想要结帐购买商品。
For instance, in our previous example, the user shopping cart tag held all the information about the products purchased.
例如，在我们的前一个示例里，用户购物车标记存有关于购买的产品的所有信息。
For instance, in our previous example, the user shopping cart tag held all the information about the products purchased.
例如，在我们的前一个示例里，用户购物车标记存有关于购买的产品的所有信息。
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