1. The governor granted a commutation of the prisoner's sentence.
州长批准了对囚犯刑期的减刑。

2. I have to take two trains for my daily commutation to work.
我每天上班通勤需要乘坐两趟火车。

3. The digital camera has commutation for film cameras.
数码相机是胶卷相机的替代品。

4. The commutation of ideas and opinions is essential for progress.
思想和观点的交流对于进步是必不可少的。