说英语的国家英文怎么写

　　I think we have a moral responsibility to help these countries.

　　我认为我们在道义上有责任帮助这些国家。

　　Cultural exchanges are a way of building bridges between countries.

　　文化交流是各国之间建立联系的纽带。

　　A trade agreement was concluded between the two countries.

　　两国之间签署了贸易协定。

　　The point of the lesson is to compare the two countries.

　　本课的目的是比较这两个国家。