repair welding

例句：

1. 1. The car needs to be repaired before it can be driven again.
   这辆车需要修理才能再次行驶。
2. 2.The engineers were busy repairing the damaged bridge.
   工程师们忙于修复损坏的桥梁。
3. 3.Repair welding is a skill that requires years of practice and training.
   修理焊接是一项需要多年实践和培训的技能。