Dun huang is a renowned tourist resort famous for the Mogao Caves.In ancient times, Dun huang was the center of trade between China and its western neighbors. With the flourishing of trade along the Silk Road, Dunhuang quickly developed to become the most open area in international trade in Chinese history. Over 1,000 caves were cut out of cliffs in Dunhuang. The caves reflect Silk Road civilization and important aspects of Chinese people's religious life, art, and customs in history, including the introduction of Buddhism to China during this period. Dunhuang grottoes have always been regarded as the national treasure of China.

　　1.敦煌是以莫高窟而著名的旅游胜地:“以...而著名”可译为be famous for。类似短语还有be famous as(作为…而著名)。“旅游胜地”可译为tourist resort。

　　2.在古代，敦煌是中国与其西方邻居之间的贸易中心：“与...之间”可译为between,因为这句话中表示的是二者之间，而三者或三者以上之间则要用among,翻译时要注意介词的正确使用。

　　3.敦煌石窟一直被视为中国的国宝：其中“被视为”可译为be regarded as,也可译为be seen as或be considered as。“国宝”可译为national treasure。