He made a commitment to pay the rent on time.他保证按时付房租。
I am very tired because I have taken on so many commitments.我很累,因为我承担了很多的事情。
They are looking for someone with a real sense of commitment to the job.他们正在找一个对这一工作有献身精神的人。

［词源］＜拉丁语committere(委托,做)