Part3 What is the biggest achievement in this world?

句型4组和词汇2组

The mass production of the automobile was a great gift to the humankind

汽车产品是人类最大的礼物

Later the commercialization of automobile was done in the early part of 20th century

20世纪汽车产品开始商业化

Distance is no longer a barrier for people now 距离不是问题

All classes of people 社会各阶层的老百姓

The intended places or destinations 目的地

People had to travel on feet or on horseback 人们出行靠走的或者骑马