... pre-existing microcrack 预先存在的微裂缝 pre-existing rock 先成岩石 pre-existing topography 原有地形 ...
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Rock failure process analysis (RFPA) code is used to study the failure process of rock disks with pre-existing cracks when subjected to static loading.
本文利用岩石破裂过程分析系统（RFPA）研究了含有不同角度预制裂纹的岩石试样在动态载荷作用下的破坏过程。
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In a radical experiment which he called "building without foundations", he skipped the concrete substructure and instead built the guest wing on a pre-existing natural rock formation.
BBC: An Alvar Aalto tour of Finland
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