Mongolia is the second least populated country with just 4.2 people per square mile.

蒙古是只有4.2秒，每平方英里人口最少的国家的人民。

youdao

Mongolia is the second least populated country with just 4.2 people per square mile.

蒙古是只有4.2秒，每平方英里人口最少的国家的人民。

youdao