In Europe, where Russia has used supply cut-offs to put pressure on neighbouring Ukraine, discoveries of shale gas in eastern Europe could diversify supply in a useful way.

在欧洲，俄罗斯以切断天然气供应来向邻国乌克兰施压。而在东欧页岩中发现的天然气能有效的使供应源多元化。

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To increase the pressure on him, Russia has now raised gas prices and slashed its supply of crude.

为了向他施压，俄罗斯提高了天然气价格，减少了原油供应。

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The spherical tank is the storage of liquefied gases, and one of the commonly used pressure vessel, in the petroleum, chemical, metallurgical and city gas supply and so widely used.

球形储罐是储存各种气体和液化气体的常用压力容器之一，在石油、化工、冶金和城市燃气供应等方面得到广泛使用。

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More generally, Iranian calls to form a gas cartel are useful for Russia as they serve to put pressure on European states that, in the wake of gas and oil supply disruptions over the past 13 months, are having second thoughts about deepening their dependence on Gazprom.

ECONOMIST: Don't worry, there won't be an effective gas cartel