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Sustainability is not an option; it's a necessity for the future of our industry.

我們手里的金錢是保持自由的一種工具；我們所追求的金錢，則是使自己當(dāng)奴隸的一種工具。

The founders of a new colony, whatever Utopia of human virtue and happiness they might originally project, have invariably recognized it among their earliest practical necessities to allot a portion of the virgin soil as a cemetery, and another portion as the site of a prison.

每個(gè)孩子都應(yīng)該在書中看到自己的影子。