... 三维实体模型(Solid model) 单一数据库(Single database) 以特征作为设计的单位(Feature-besed design) ...
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原因在于这些产品不愿意与单一数据库产品捆绑在一起。
The reason is that such products do not want to be tied to a single database product.
您应该还记得,Rails模型是包装单一数据库表的对象。
As you recall, Rails models are objects that wrap a single database table.
一个解析错误,使配置文件只有一个不可用的单一数据库连接。
A parsing error that left configuration files with only a single database connection unusable.
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