迁移到城市的坏处就是人口太多，车辆也多。不管去到哪里都是人流，路上的塞

迁移到城市的坏处就是人口太多，车辆也多。不管去到哪里都是人流，路上的塞车情况非常严重，到了晚上造成噪音，扰人清梦。车排放出的废烟也会造成空气污染。

結果 (英文) 1:

The badness is too many people migrated to the cities, the vehicles. No matter where people, very serious traffic congestion on the road, at night noise, disturbing dreams. Car emissions of waste smoke can also cause air pollution.

結果 (英文) 2:

Migration to cities is too bad people, vehicles and more. No matter where are the people, a very serious traffic congestion on the road, at night causing noise, disturbing their sleep. Vehicle emissions of waste smoke can also cause air pollution.

結果 (英文) 3:

The downside is that the population migration to the city too much, too many vehicles. No matter where are people, traffic congestion on the road at night is very serious, causing annoying noise. The waste smoke emissions from cars can cause air pollution.