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书籍就像一面镜子。如果一头驴子往里看,你不能指望一个天使会往外看。
The beauty of mathematics only shows itself to more patient followers.
Systems have sub-systems and sub-systems have sub- systems and so on ad infinitum - which is why we're always starting over.
不登上高山,就不知道天是多么高远;不亲临深溪,就不知道地是多么深厚。
Every reaction is a conversation between atoms.
一本好书的衡量标准在于它让你思考和感受的程度。