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The world needs reliable energy, and coal still plays a critical role in providing it.

Whenever people talk to me about the weather, I always feel certain that they mean something else.

在量子力學(xué)中，觀察的行為會(huì)改變被觀察的系統(tǒng)。

You have to believe in yourself when no one else does.

"The past is always with us, and it shapes who we are and how we see the world."