This ancient defense bulwark attracted emperors and men of letters of various dynasties. They were amazed at the vast sea to its south and the magnificence of this old dragon's head.

这座昔日的军事要塞引来历代帝王、文人来此观海览胜，南望浩瀚大海碧波万里，尽赏龙头入海的恢弘气势。

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He stared out at the vast emptiness that was the sea.

他放眼向辽阔无际的海洋望去。

《牛津词典》

The existence of a vast ungoverned space in Africa's Horn does not just provide a useful haven from which pirates can hunt their prey at sea.

非洲角上大片无人统治空间的存在不仅仅给在海上寻找猎物的海盗们提供了有用的避难所。

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While it doesn't affect birds that feed at sea, which is the vast majority of birds around the island, it could harm those that feed on land, such as ducks, gulls and skuas.

WSJ: This British Assault on an Island Off Argentina Is for the Birds

At its height in the 16th century it was a vast multiconfessional empire, stretching to the Black Sea, with no fewer than six legal languages, including Hebrew and Armenian.

ECONOMIST: Vilnius