这是使范畴系统的逻辑顺序达到整体最优的关键。
This is the key point to achieve the best on the whole for the logical sequence of the categorical system.
从某种意义上说,这些方法都是构造范畴系统的方法。
In a sense, they are also the ways to construct the categorical system.
我们在第七章中讨论了构造范畴系统的途径:抽象上升到具体。
We have discussed the approach to constructing the categorical system: advancing from the abstract to the concrete.
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