And there will be cities under the sea. The first of these will have been completed.

到时候也会有海底城市，这些城市中的首批将已经完成。

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Many of the world's major cities will be under sea water.

世界上许多重要的城市将被淹没在海水中。

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Scientists are uncovering the secrets of twin port cities lost under the waters of the Mediterranean sea, a researcher said recently.

一名研究人员近日透露说，科学家正在揭开出两座港口城市消失在地中海水下的谜底。

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Located at the thin end of the Thames tidal estuary, it is considered to be one of the cities most under threat from rising sea levels with around 150 square kilometers located below high tide level -- home to more than one million Londoners.

CNN: London leads climate change fight