One of the biggest deals involves Turkey's approval for Moscow's planned South Stream gas pipeline that will carry Central Asian gas from Russia under the Black Sea to Europe, bypassing Ukraine.

其中一笔重大交易就是土耳其同意莫斯科筹划的南溪天然气管道项目；此项目将把中亚天然气从俄罗斯经由黑海，绕过乌克兰运送到欧洲。

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What has most excited the conspiracy theorists is that Nis is close to the point where a controversial planned gas pipeline, South Stream, will cross Serbian territory.

导致阴谋理论升级的是尼斯临近那个有争议的、计划中要穿越塞尔维亚国土的输油管道南部支线。

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The planned South Stream pipeline will bypass Ukraine, through which 80% of Russia’s gas exports to Europe now flow.

目前，俄80%的输欧天然气要过境乌克兰。

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Another project which Mr Putin is determined should go ahead is Russia's South Stream gas pipeline, across the Black Sea and into the heart of the European Union.

BBC: Struggle for Central Asian energy riches

Moscow also tried to hire former Italian Premier Romano Prodi as chairman of a second gas pipeline, South Stream.

CENTERFORSECURITYPOLICY: A Bear energy market

Bulgaria is also involved in two rival gas pipeline projects: Russia's South Stream pipeline and the EU-backed Nabucco pipeline.

BBC: Bulgaria profile