skate throw-off device

例句：

1. 1.The skateboarder was caught by the police for riding without a helmet.
   滑板手因未戴头盔而被警察逮捕。
2. 2. The skateboarder used the throw-off device to avoid hitting pedestrians.
   滑板手使用了抛脱装置来避免撞到行人。
3. 3. The skateboarder was required to wear a helmet and use the throw-off device when riding on public streets.
   滑板手在公共街道上骑行时必须佩戴头盔并使用抛脱装置。