1. The land has been regenerated by rotation of crops.
    这块土地已通过轮作法恢复了地力。

2. The land has been regenerated by rotation of crops.
    这块土地已通过轮作法恢复了地力。

3. Periodic rotation of tyres will result in longer tyre life.
    轮胎定期换位能延长其使用寿命。