Valuable source of caviar and isinglass; found in black and Caspian seas.

鱼子酱及鱼胶的宝贵来源；产于黑海和里海。

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A region of southeast European U. s. s. R. between the Black and Caspian seas.

苏联欧洲部分东南部的地区，位于黑海与里海之间。

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Round the north-east of the Black and Caspian Seas were coming the Medes and Persians.

从黑海和里海的东北部来了米堤亚人和波斯人。

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In the area between the Black and the Caspian Seas lie countless festering issues, including separatist disaffection in two parts of Georgia, a territorial row between Azerbaijan and Armenia, and the question of a pipeline to carry oil to the Mediterranean via Turkey.

ECONOMIST: Russia’s brutal folly | The

An oil pipeline between the Caspian and Black seas, which avoids Russia, was declared open.

ECONOMIST: Marking time

Dagestan is one of seven small republics within the Russian Federation that together comprise Russia's North Caucasus region, a predominantly Muslim area which itself is wedged between the Caspian and Black Seas.

CNN: Boston bombing suspects: The Dagestan connection