You cannot delete the last occurrence of the account 'XXXXXX' in the historical rate data entry screen.

不能在历史汇率数据输入屏幕内删除账户 “XXXXXX” 的最后一个实例。

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The technique might look a bit annoying at first glance, but it clearly minimizes the error rate for users who delete sensitive data by mistake.

乍一看该技术也许看起来有点令人生厌，但是对于错误地删除掉敏感数据的用户来说，这无疑把出错的几率降到最低。

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Finally, data access typically implements pure CRUD (Create, Read, Update, Delete) a where as enterprise services implement business meaningful interface, like rate policy, etc.

最后，数据存取一般实现纯的CRUD(创建、读取、更新、删除)a功能，作为对企业服务实现业务有意义的接口，比如费率策略等。

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