广义模糊选择操作中允许用户自定义广义模糊比较运算以及指定阈限，从而增强了模糊查询的表达能力和灵活性。
In the generalized fuzzy selection operation, a user may define generalized fuzzy comparators and provide thresholds, hence the expressive power and flexibility of fuzzy queries are enhanced.
用户操作日志包括用户管理日志、黑车日志、登录注销日志的后台自动产生功能的设计与实现，以及用户对日志信息的查询、备份、导出等功能的设计与实现。
This part not only implements function of user management logs, black car logs, login and logout logs to automatically produce, but also logs query, logs backup, logs export etc for users.
管理员可以进入系统的后台进行管理，可以进行商品的添加、修改、删除，用户订单的处理、客户信息的查询以及其他基本信息的录入和修改等操作。
The administrator can enter the systematic back-stage to manage, adding, modifying, deleting the product, to deal with the user's order, to inquiry other basic information and so on.
用户可一次处理数个查询，通过几种模式编辑查询，观察运算结果，以及执行任何其它需要的操作。能查看查询计划。
You can work with several queries at once, edit queries and view the execution results in several modes and perform any other operations you may need in your work with database queries.
用户可一次处理数个查询，通过几种模式编辑查询，观察运算结果，以及执行任何其它需要的操作。能查看查询计划。
You can work with several queries at once, edit queries and view the execution results in several modes and perform any other operations you may need in your work with database queries.
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