人们对酸和碱的认识经历了一个从现象到本质，从个别到一般，逐步深化完善的过程。
To the knowledge of acid and alkali, people have gone through a process from appearance to essence, from a few to generality, and to achieve perfect gradually.
如果说存分机制建设是起点，贷分机制就是其深化、完善，学分兑换机制则是其更高境界。
If saving system is a point of departure, loaning credit system will be deep and perfect, then the credit exchange mechanism will be its higher state.
上述三个维面，进一步拓展和深化了古典情景之论，将其推到了完善的境地。
The above-mentioned three aspects develop and deepen the ancient feeling and setting criticism, pushing it to the perfect condition.
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