This reference could be a purchase order number , a customer number , or a group of words that identifies that shipment - - such as " 10 crates " or " march inventory . 此包裹相关信息可以是订单号、客户号码或是诸如“ 10箱”或“三月库存”等识别该货件的一组词语。
As a general rule , then , only persist items that are unchanging for the client - like the order number itself , which won t change across requests - or items that are not used by business objects 一般来说，只持久存储对客户来说不改变的条目（比如订单号本身，它在请求之间不会改变）或者不由业务对象使用的条目。
Finally , go ahead and set up any persistent variables you might need ; the example in listing 4 stores an order number , which it uses to look up an order in the business objects portion of the application 最后，前进一步，设置可能需要的持久变量；清单4中的示例保存一个订单号，该订单号用于在应用程序的业务对象区查询订单。
Order numbers for vehicles to freight were got by particle position vector , single vehicle route was got by aco , and then evaluated and filtered particales according to optimal vehicle routes , circulated until terminate qualification 由粒子群算法的粒子位置向量得到每辆车所需运送的订单号，用蚁群算法优化单车路径，根据优化的总路径评价和筛选粒子，直到满足终止条件。
In case of l / c transactions , bill of lading / airway bill must accompany invoice and packing list in triplicate and show l / c no . , po no . and date unless otherwise specified and be forwarded immediately by airmail after fax 如果使用银行信用证进行交易，船运及空运的帐单中必须包含货物清单和包装清单一式三份，注明信用证号、采购订单号和对应日期，除非另有说明，同时在传真告知买方后立即用空邮方式寄出。
