在效率和清洁方面，公共汽车、火车和其他形式的公共或大众交通工具优于私家车。
In terms of efficiency and cleanness, buses, trains and other forms of public or mass transportation are superior to the private automobile.
当我们搭乘大众交通工具时，我们应该要礼让老人先坐。
When we take public transportation, we should let an elderly person sit down first.
我发现有一件事是真的很大的不同，那就是大众交通工具系统。
One thing that I really notice is the public transportation system is really different.
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