1. robot-arm什么意思

1. The disabled can use robot-arm to do some simple movements.
    残疾人可以用机器手做一些简单的动作。

2. The system is made up of the mechanical structure, which includes stent, robot-arm and lifting base, and control system, including the PC, USM and the controller.
    该系统主要由机械结构和控制系统组成。机械结构由支架、机械臂和系统升降台等组成，控制系统由上位计算机、超声电机及控制器组成。

3. A robot-arm from the Endeavour will grab the telescope and hold it while the astronauts make the necessary repairs.
    当宇航员进行必要的修复工作时，奋进号上的一只机器手将抓住望远镜并托住它。