reversible change over

例句：

1. 1. The process of reversing a car's engine is not easy.
   汽车发动机反转的过程不容易。
2. 2.The company has made a decision to reverse its previous policy.
   该公司已决定撤销之前的政策。
3. 3. The scientist found that the chemical reaction was reversible.
   科学家发现化学反应是可逆的。