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It is shown that the statistical data from survey units, which describe the scale of social and economic system, must be approximately subordinate to logarithm normal distribution.
证明在社会经济系统中，反映研究对象规模大小的统计数据近似服从对数正态分布。
The stand diameter distribution of juvenile stand appears an inversed "J"form, and that of the half mature forest approximately a normal distribution.
林分直径分布，幼龄林呈倒“J”型，壮龄林近似于正态分布；
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