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The mind once enlightened cannot again become dark.
一旦心灵被启蒙,就无法再次变得黑暗。
The most damaging phrase in the language is: 'It's always been done this way.'
The search for reciprocity laws is a fundamental theme in the history of mathematics.
可持续性不是一种选择,而是我们对下一代的责任。