anisotropic rock mass

例句：

1. 1. The rock isanisotropic, so it's difficult to drill through.
   这种岩石是各向异性的，所以很难钻透。
2. 2. The material has anisotropicproperties, which can affect its strength andductility.
   这种材料具有各向异性的性质，这会影响它的强度和延展性。
3. 3. The structure of the material isanisotropic, meaning that itchanges directionally.
   这种材料的结构是各向异性的，意味着它的方向性会发生变化。