It's over 2,000 years old and more than 4,500 miles long.

问题描述:

It's over 2,000 years old and more than 4,500 miles long.

它有4500多里长,2000多年历史。

这是超过两千年之久,超过4500英里长

它有将近200年的历史,长于4500米.