事实表可以根据一或多个外键过滤。
The fact tables can be filtered on one or more of their foreign keys.
我们还知道如何在模式文件中表示外键。
We've also seen how foreign keys are represented in the Schema files.
So in addition to having these two carbon bonds, we actually also have four carbon hydrogen bonds in addition to our carbon-carbon bonds.
在这碳碳之间的键以外,我们还有四个碳氢键,除了我们的碳碳键外。
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