Our transportation systems have maps in English only and often we ourselves have difficulty understanding them.
我们的交通系统只有英文地图，我们自己也常常难以理解。
2
As for foreign systems of governance, Dover's citizens will tell you: that is what the English Channel is for.
至于外国管理制度，多佛尔市民会告诉你：那就是英吉利海峡的目标所在。
3
So, what I want to do is, I want to discuss the scientific notion of language, at first restricting myself to systems like English and Dutch and American sign language and Navajo and so on.