地球的年龄大约有多大?
问题描述：
地球的年龄大约有多大?
答
How old about the earth
答
What about the age of the earth?
答
很多亿年了 50亿下吧
答
地球的年龄大约有多大？
The age of the earth is about how old?
答
46亿年
How many years of the earth have