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隨機實驗是因果推理的黃金標準，但它們并不總是可行的。

創新不僅僅是創造新事物，更是要為人們的生活帶來改變。

我相信夢想的力量。

All men are immortal， but those who are not educated are immortal in a lower and less enviable sense.

I needed a drink, I needed a lot of life insurance, I needed a vacation, I needed a home in the country. What I had was a coat, a hat and a gun.