由一个尝试和妥中的方案已经由一个地球系统领域的科学家团体提出，该团体是以“地球界限”为名义的，这个方案是从克鲁岑那里获得的灵感。
A way to try and split the difference has been propounded by a group of Earth-system scientists inspired by (and including) Dr Crutzen under the banner of "planetary boundaries".
在地球的重力场中，负的能量相应于有界限运动，正的能量相应于无界限运动。
In the gravitational field of the earth, negative energy corresponds to bounded motion and positive energy to unbounded motion.
说明：在这张绚丽的影像中没有突然、明显的界限显示地球白天进入夜晚的经过，影像拍摄的是我们地球上空拍摄的海洋及云朵。
Explanation: No sudden, sharp boundary marks the passage of day into night in this gorgeous view of ocean and clouds over our fair planet Earth.
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