Conclusion: There was no statistical difference of strain and strain rate between the different segments and the different walls.
结论：应变与应变率在同一室壁不同节段与不同室壁同名节段之间差异无显著性。
Results: Although strain and strain rate declined from basal segment to apex, there was no statistical difference.
结果：基底段到心尖段应变与应变率呈下降趋势，但统计学差异无显著性。
In the second part, the difference of modal strain is introduced.
第二部分提出振型应变差的概念。
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