常見例句雙語例句Smart electric trolley, the source and circuit diagrams, some functions have been achieved, other functions need perfect!智能電動小車，源程序和電路圖，部分功能已經(jīng)實現(xiàn)，其他的功能還需要完善！Many foreign cities in developing electric trolley buses and trams, as they are beneficial to the environment.國外很多城市都在發(fā)展無軌電車和有軌電車，因為它們對環(huán)境有利。Beijing is also vigorously developing electric trolley buses in recent years, Beijing has grown from 500 the number of trolley bus …北京也在大力發(fā)展無軌電車，近年來，北京無軌電車數(shù)量已經(jīng)從500 … 返回 electric trolley