How many countries are there in the world?  世界上有多少个国家呢？

　　There are 195 different countries in the world. 世界上有195个不同的国家。

　　37 countries are in Asia and 53 countries are in Africa. 37个国家在亚洲，53个国家在非洲。

　　50 countries are in Europe. 50个国家在欧洲。

　　After the year 1990, 33 different new countries were made. 1990年以后，33个不同的新国家诞生。

　　They include Yemen, Kazakhstan, Serbia and so on. 其中包括也门、 哈萨克斯坦、塞尔维亚等。