Both genetic error of main and lateral root number was bigger than that of environmental error, and their repeat was 95% and 87% respectively.

主根平均根数和侧根平均根数两个性状的遗传方差均大于环境方差，其重复力分别可达95%和87%。

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These sources of error and uncertainty include variations in flare efficiency, mis-identification of flares, non-continuous sampling, and environmental effects like snow reflection.

这种误差来源和不确定性包括燃除效率差异、燃除的判断错误、不连续的采样、以及像雪花反射那样的环境影响。

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CONCLUSION: Durative of gymnastic movement, error of technical action and environmental factor are the main effect on the occurrence of avascular necrosis of the femoral head.

结论：体操运动训练的持续性、技术动作错误以及周围环境因素均是股骨头缺血性坏死伤病损发生的主要影响因素。

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