ring system

例句：

1. 1. The new phone has a ring system that allows you to answer calls without pressing any buttons.
   这款新手机有一个环形系统，可以让你在不按任何按钮的情况下接听电话。
2. 2. The old clock had a mechanical ring system that could only be wound by hand.
   旧时钟有一个机械的环形系统，只能手动上弦。
3. 3.The new car features a digital display with a ring system for easy reading of speed and fuel levels.
   这款新车配备了数字显示屏，具有环形系统，便于读取速度和燃料水平。