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不要害怕失敗，因為失敗是成功的墊腳石。

The PAC learning framework provides a formal way to analyze the efficiency and effectiveness of learning algorithms.

I'm a failed poet. Maybe every novelist wants to write poetry first, finds he can't and then tries the short story which is the most demanding form after poetry. And failing at that, only then does he turn to the novel.

孤獨は、自分自身と向き合う時間だ。