flex joint

例句：

1. 1.The car's engine is a complex flex joint system.
   汽车的引擎是一个复杂的可动关节系统。
2. 2. The robot's arms have flexible joints that allow it to move in any direction.
   机器人的手臂有灵活的关节，可以向任何方向移动。
3. 3.The scientist designed the new device with flex joints that can adapt to different environments.
   科学家设计了这款新设备，具有可动关节，能够适应不同的环境。