Many data sources include data that is irrelevant for understanding stored information, such as counters, temporary helper tables used to sort data, and multilingual text for the user interface.
很多数据源包括的数据都是和存储信息无关的，例如计数器，用来分类数据的临时助手以及用户接口的多种语言文本。
National Language Support (NLS) : If you are addressing customers in many countries, you will want to provide a multilingual user interface.
国家语言支持(NLS)：如果面对许多国家的客户，您将希望提供一个多语言用户界面。
The service provider must provide an interface with locale information in order to support a multilingual business operation.
服务提供者必须提供一个带有语言环境信息的接口以支持多语种业务操作。
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