With the acceleration of industrial growth came acute urban crowding and accompanying social stress-conditions that began to approach disastrous proportions when, in 1888, the first commercially successful electric traction line was developed.
工业增长加速带来严重城市拥挤和社会压力——当1888年首条商业成功的电力牵引线路开发时，这些情况开始接近灾难性比例。
With the acceleration of industrial growth came acute urban crowding and accompanying social stress-conditions that began to approach disastrous proportions when, in 1888, the first commercially successful electric traction line was developed.