The extension of conception is ambiguous that the quality of engineering rock body is good or bad, it contains many fuzzy phenomena, this is what fuzzy math to study.
工程岩体质量的好与坏，其概念的外延是不明确的，存在着很多模糊性现象，这正是模糊数学所要研究的。
Rocks are non-transparency and brittle. It is difficult to simulate the movement of rock pieces in cut cavity by math and physics.
岩石属非透明脆性介质，碎块在其内部运动过程的数学模拟和物理模拟都有较大难度。
Rocks are non-transparency and brittle. It is difficult to simulate the movement of rock pieces in cut cavity by math and physics.
岩石属非透明脆性介质，碎块在其内部运动过程的数学模拟和物理模拟都有较大难度。
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