现场：RichardFreund教授(右)和美国国家地理频道制片人在遗址地。

On location: Professor Richard Freund (right) and a National Geographic Channel filmmaker at the site.

youdao

现场：RichardFreund教授(右)和美国国家地理频道制片人在遗址地。

On location: Professor Richard Freund (right) and a National Geographic Channel filmmaker at the site.

youdao