用trolleybuses造句子，“trolleybuses”造句

3、At work and school time, only some cadres from other places are wandering in the street. There are few buses and trolleybuses on the roadside.

1、Power rectifier substation for trolleybuses and tramways

2、The variable voltage variable frequency(VVVF) control of 3-phase induction motor for driving trolleybuses is expounded.