bolt hole crack

例句：

1. 1.The old car's bolthole was filled with rusty metal.
   那辆旧车的车头螺栓孔里满是锈迹斑斑的金属。
2. 2. The bolthole crack in the wall made it difficult to paint over.
   墙上的螺栓孔裂缝使得油漆难以覆盖。
3. 3.The engineer inspected the bolthole crack and determined that it needed repair.
   工程师检查了螺栓孔裂缝，并确定需要修理。