Geological research indicates that the Caspian sea was once part of a prehistoric sea known as the Paratethys.

地质研究表明，里海曾经是被称为副特提斯海的史前海洋的一部分。

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Marco Polo noted in 1272 as he passed by Baku, on the Caspian sea, that oil lamps were common.

1272年，马卡波罗在通过里海的巴库时发现油灯在那里很普遍。

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Adding to its complexity, Kashagan lies at the heart of a delicate ecosystem, home to many species unique only to these waters, such as the sturgeon and the rare Caspian seal.

让情况更为复杂的是，卡沙干附近的海域里很多物种都是那里独有的，如鲟鱼和里海海豹。

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It gradually expanded in size, reaching to the Southern Ural Mountains and the Caspian Sea, and emerging as a dynastic state.

其领土逐渐扩大,延伸至乌拉尔山脉南端和里海,并发展成为王朝国家

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Although his country has not gained as much influence east of the Caspian as he hoped, it has made headway, helping such Turkic-speaking countries as Azerbaijan and Turkmenistan to tilt their markets, especially in oil and gas, away from Russia and to the West.

ECONOMIST: CHARLEMAGNE

The territorial claims of the foreign ministry have complicated their attempts to join Caspian projects as strictly commercial entities.

ECONOMIST: Caspian carve-up | The

The United States strongly supports the Turkish route, although there is plenty of competition - not least from Russia, which still regards the former Soviet Caspian region as its sphere of influence.

BBC: Caspian gas deal signed