replacement vein

例句：

1. 1. The doctor replaced the damaged bone with a metal plate.
   医生用金属板替换了损坏的骨头。
2. 2.The patient was given an injection to replace the missing part of his arm.
   患者接受了注射来替代他手臂缺失的部分。
3. 3. The surgery involved replacing the old valve with a new one.
   手术涉及用新的阀门替换旧的阀门。