Seismic velocity anisotropies are mainly caused by lattice preferred orientation( LPO) , shape preferred orientation( SPO) of the major minerals, and oriented microcracks.
影响各向异性的主要因素有岩石的结构构造、矿物的晶格优选方位（LPO）、形态优选方位（SPO）和定向微裂隙。
Under HRTEM, the lattice fringes of the mesophase pitch carbon are arranged regularly, is a long range ordered crystal structure, and the preferred orientation is high.
在HRTEM下，中间相沥青炭的晶格条纹排列规整，是一种长程有序的晶体结构，晶化程度很高。
Under HRTEM, the lattice fringes of the mesophase pitch carbon are arranged regularly, is a long range ordered crystal structure, and the preferred orientation is high.
在HRTEM下，中间相沥青炭的晶格条纹排列规整，是一种长程有序的晶体结构，晶化程度很高。
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