在1993的时候我们还必须购买基础软件，并为这些基础软件的维修支付资金——运行系统，编辑器，网络服务，应用服务，资料库。
Back in 1993 we had to buy and continue to pay for maintenance on everything we needed just to build our service — operating systems, compilers, web servers, application servers, databases.
这允许您浏览可用的资料来源、显示资料表、资料行及其包含的其他项目，同时编辑并建立资料库项目。
This permits you to browse available data sources; display information about the tables, columns, and other elements they contain; and edit and create database elements.
例如，如果其他使用者编辑您标示为删除的资料表，您可能想要研究是否应在更新资料库之前删除该资料表。
For example, if another user edited a table that you marked for deletion, you might want to research whether you should delete it before you update the database.
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