1.

1. 包围：ring finger 无名指 | ring in 包围 | ring off 挂断电话

2. 振铃输入：环磁头 ring head | 振铃输入 ring in | 振铃指示器 ring indicator

3. 上班：102 stay in the ring不要放弃 | ring in 上班 | ring out下班

1. （给工作单位等）打电话
    If you ring in, you phone a place, such as the place where you work.

    e.g. Cecil wasn''t there, having rung in to say he was taking the day off.
           塞西尔不在单位，他已经打电话请假了。