一份详细的测量古防御工事长度的调查称，中国万里长城比我们现在想象的要更伟大。

The Great Wall of China is even greater than previously thought, according to the first detailed survey to establish the length of the ancient barricade.

youdao

一份详细的测量古防御工事长度的调查称，中国万里长城比我们现在想象的要更伟大。

The Great Wall of China is even greater than previously thought, according to the first detailed survey to establish the length of the ancient barricade.

youdao