求英语高手帮我理解下面一段话（route、line、trip搞不懂）

题目

求英语高手帮我理解下面一段话（route、line、trip搞不懂）
The routes driven by buses are partitioned into lines.Each line has exactly one
route,which starts and ends at the bus station.When a bus makes a trip,it follows
the route of exactly one line.Each day,one or more buses can make several trips
of one line.

答案

整段话是关于公交车站管理的
The routes driven by buses are partitioned into lines.Each line has exactly one
route,which starts and ends at the bus station.When a bus makes a trip,it follows
the route of exactly one line.Each day,one or more buses can make several trips
of one line.
【公交总路线被划分为多段局部路线（多个实际运行的班次）,每班实际运行的公交车都遵循特定的“从起点站到终点站”的总路线.每当公交车停经一站,它都会按照总路线继续走下去.每一天,一条总路线上可以有不止一班公交车同时运行.】
route就是指：规划好的整体的常规的总路线
line是指：实际运行的班次
trip就是行驶过程,在文中这里理解为：从一站到下一站的行驶过程.