fracture theory

例句：

1. 1. The car's engine has a fracture in the cylinder head.
   这辆车的引擎在气缸头有裂缝。
2. 2.The old tree had several fractures that needed to be repaired.
   那棵老树有几处裂缝需要修复。
3. 3. The rock was cracked open by the earthquake.
   地震使岩石裂开了。