英文：isotropy assumption 认为固体材料沿各个方向上的力学性能完全相同。工程上常用的金属材料，其各个单晶并非各项向同性的，但是构件中包含着许许多多无序排列的晶粒，综合起来并不显示出方向性的差异，而是呈现出各向同性的性质。在材料力学中主要研究各向同性的材料。
他们指出WMAP的数据明显显示出在更小的角度尺度上具有更多的热点和冷点，因此假设微波背景各向同性是错误的。
They point out that the WMAP data clearly show that there are far more hot and cold spots at smaller angular scales, and that it is therefore wrong to assume that the microwave sky is isotropic.
反分析计算时采用分层均质模型，将计算区域内各层岩层分别视为均质各向同性体，初始地应力假设成线性分布。
It assumed that the initial rock stresses is in linear distribution, all layers of strata are regarded as layered homogeneous in calculation districts, and this model is applied to doing calculation.
各向同性损伤理论是建立在材料是均匀的、各向同性的以及损伤也是各向同性的假设基础之上。
The theory of isotropy damage is based on the hypothesis that the material and damage are symmetrical and isotropic.
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