然而，在每个建筑物内部，公寓编号是唯一的，这种属性叫做部分码（partial key），在ER图中用下划虚线表示。部分码和属主实体的唯一属性的组合可以唯一标识弱实体的每个实例。
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Finally, the design and implementation of partial key functions of the system were written.
最后介绍了系统中部分关键功能的设计与实现。
Partial Key Joins occur when there is an implicit many to many relationship between a dimension and a fact.
当一个维度和一个事实之间有一个隐式的多对多关系时会出现 Partial Key Joins。
If you want one partial key for quickly reaching the Goal, I would recommend that you take full responsibility for everything that happens to you.
如果你想要一个快速达成目标的片面方法，我会建议你对任何发生在你身上的事负起责任。
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