The molecules of carbon dioxide in the Earth's atmosphere affect the heat balance of the Earth by acting as a one-way screen.

地球大气层中的二氧化碳分子像一个单向屏一样影响着地球的热量平衡。

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They live in precarious balance and one of the toughest environments on earth.

他们生活在不稳定的平衡中，并且这是地球上最艰苦的环境之一。

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We're increasingly aware of the fact that we can't control Earth systems with engineering alone, and realizing that we need to moderate our actions if we hope to live in balance.

我们越来越意识到，我们不能仅仅靠工程来控制地球系统，并且意识到如果我们希望生活在平衡中，我们需要调节我们的行为。

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In 1991, Gore wrote the bestseller, "Earth in the Balance, " a call to arms to protect the air, water and land.

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He also is the author of "Earth in the Balance: Ecology and the Human Spirit, " which proposes an international plan to solve the global environmental crisis.

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Whatever Immelt and his customers think of the thesis that the Earth is in the balance, they know they are going to be living in a world of high energy prices, caps on greenhouse gases and ever tighter environmental regulations.

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