对于测试样本低于25以下时，几何平均值比中位数能更好的报告最佳任务完成时间中间值。
The Geometric Mean works better than the median for reporting the best middle task time for sample sizes less than 25.
从而论证了不同约束条件下，试样的几何尺寸因素对其J阻力曲线变化趋势的影响规律。
As a result, the effects of geometric size of test piece on J-R curve un-der different degree of constraint are argued.
对于特定的试样和裂口几何形状，最大荷载与裂纹长度有关，而与材料无关。
For a given specimen and notch configuration, maximum load is always dependent on the crack length and independent of the material.
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