on the road
1．travelling旅途中
My letter will soon reach him； it is on the road．我的信正在路上，他很快就能收到。
How long will you be on the road？你在路上要花多长时间？
2．changing； going from one condition to another转变；朝…方向发展
Jane was very sick for several weeks， but now she is on the road to recovery．简前几个星期病得很厉害，现在正在恢复中。
Conscientious study put the student on the road to success．勤奋学习使那学生即将获得成功。