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The beauty of mathematics lies in its ability to reveal hidden symmetries and truths.

文件就像定期保險(xiǎn)：它令人滿意，因?yàn)閹缀鯖](méi)有人訂閱它取決于它的利益。

The only thing you sometimes have control over is perspective. You don't have control over your situation. But you have a choice about how you view it.