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Diversity in thought leads to innovation in action.

Every tree we plant today is an investment in a greener, healthier tomorrow.

The price of freedom is eternal vigilance.

判斷兩個(gè)λ表達(dá)式是否等價(jià)的問(wèn)題是無(wú)法解決的。

If you’re not failing, you’re not pushing hard enough.