The Naxi's desire not to upset the balance of nature has made Lijiang an unusual example of ancient Chinese town planning, one not governed by man-made order, but by the 10 contours of nature.

纳西人不想打破自然界的平衡，这种观念使丽江成为中国古城镇规划中的一个不同寻常的例子。它没有人为安排的秩序，而是依自然环境的轮廓顺势塑形。

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So some experts declare that the balance of nature is being upset, so that the very survival of man is in danger.

于是专家们宣称自然界正在失去平衡，使人们的生存环境处于危险中。

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The balance of nature is being upset.

自然界正在失去平衡。

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And developers,logging companies, and strip-mine operators on the edge of the swamp can easily upset the delicate balance of nature in the area.

VOA: standard.2010.03.29