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Every material has its own memory and history.
An artist's responsibility is to show the world what it refuses to see.
革命就像骑自行车,如果不前进就会倒下。
对所有人有礼,与多数人交际,和少数人亲近,交一位朋友,不与人为敌。
The process of discovery in mathematics is often more important than the result itself.