supporting arm

例句：

1. 1. The engineer used a supporting arm to lift the heavy machine.
   工程师使用一个支撑臂来举起这台重机器。
2. 2. The team needed a supporting arm to help them move the furniture.
   团队需要一根支撑臂帮助他们移动家具。
3. 3. The doctor used a supporting arm to stabilize the patient's arm.
   医生使用一根支撑臂来稳定病人的手臂。