You need classes to represent aspects of the store and the purchasing process: items of stock, customers and the orders they place, and so on.

您需要一些类来表示这家商店和购买过程的某些方面：库存物品、客户和客户所下的定单，等等。

youdao

For any given order number, the program identifies whether all of its items are available in stock.

对于任何给定的订单号，程序将检查它的所有项是否都可以从库存中获得。

youdao

The obvious candidate for client-side implementation is the search box, where responsiveness is a priority and only the names of the stock items, not their data, need to be parsed and displayed.

客户端实现最明显的候选者是搜索框，其中响应性是优先考虑的，不单是股票项名称，还有他们对应数据都需要解析和展示。

youdao

Officers say hundreds of items of stock, master discs and orders ready to be sent out to customers were also seized.

BBC: NEWS | UK | England | Bristol/Somerset | DVD and computer games are seized

Thousands of orders poured in--for items out of stock.

FORBES: Entrepreneurs

Store managers set prices on locally competitive items and have the discretion to stock 10% of each store with whatever items strike their fancy.

FORBES: Marketing