The number distribution of diameter grade obeys normal distribution.
雷竹株数按径阶分布服从正态分布。
The probability distribution for displacement response under the excitation force actions of multi-looms obeys normal distribution.
在多台布机扰力下的反应的概率分布服从正态分布。
It is shown that the ice thickness and the ice velocity satisfy with Lognormal distribution and Rayleigh distribution respectively, and that the ice compression strength obeys normal distribution.
结果表明：冰厚和冰速分别服从对数正态分布和瑞利分布，海冰压缩强度服从正态分布。
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