精确解与近似解的差异不仅表现在A4值的大小及符号（正负），而且表现在A4随方位的变化特征。
The exact and approximate solutions are different in the magnitude and signs (positive and negative) of A4 as well as the variations with azimuths.
摩尔圆图解法不仅可以按三个以上方向的应力（变）测量结果绘出主应力（变）方位、大小，以及应力（变）值随方位的变化；
The azimuth and intensity of main stress, and stress-values varying with azimuth can be described according to the measuring results of stress in three directions by Mohr's circle graphic method.
摩尔圆图解法不仅可以按三个以上方向的应力（变）测量结果绘出主应力（变）方位、大小，以及应力（变）值随方位的变化；
The azimuth and intensity of main stress, and stress-values varying with azimuth can be described according to the measuring results of stress in three directions by Mohr's circle graphic method.
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