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我们要不断学习,才能跟上时代的步伐。
在数学中,你不理解事物。你只是习惯了它们。
Reason is, and ought only to be the slave of the passions, and can never pretend to any other office than to serve and obey them.
The only limit to our realization of tomorrow will be our doubts of today.
人类唯一需要恐惧的,就是恐惧本身。