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温故而知新。任何学问部门里的新观念,实际上并没有什么新颖可言。试检讨一下现代各家对於花岗岩问题的意见,即可增强这个信念。二、花岗岩的现代定义
Therefore, it is new. There is nothing new in any new concept in the learning department. Trying to review the opinions of modern generations on granite issues can reinforce this belief. Second, the modern definition of granite