应用程序使用SQL查询访问数据。

Applications use SQL queries to access the data.

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用户目录保存文件细节和用户访问数据。

The user directory stores file details and user access data.

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通常，您将总是希望使用服务访问数据。

As a general rule, you will always want data to be accessed using a service.

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Have the computational hygiene, if you like, to only go through accessors, only go through methods that are actually provided to you as you do this.

请大家注意计算卫生，如果你喜欢这么说的话，只通过访问器访问数据,当你访问数据的时候,通过提供给你的方法来访问。

麻省理工公开课 - 计算机科学及编程导论课程节选

As I said, I would prefer to do something that uses an accessor that I just wrote.

来完成这个操作,因此p，Cartesian是一种访问器,它可以访问里面的数据。

麻省理工公开课 - 计算机科学及编程导论课程节选

Now I'm putting count in double quotes, not to make it a string, but to say, this is count generically. It could be counting one by one through the integers, it could also be taking a collection of data and going through them one by one. It could be doing counting in some other mechanism.

现在我把count用双引号标起来，不是说把它命名为一个字符串，而是说，这是一个通用的计数器,它可能是每一次减1的整数,也可能是拿一个集合的数据然后,一个一个的访问它们,也可能是以某种机制来计数。

麻省理工公开课 - 计算机科学及编程导论课程节选