There have been several pricing disputes between the Russian Federation and Ukraine on the trans-shipment of gas to the European Union over the past several years that have resulted in the temporary closure of pipelines, creating serious shortages in the European Union.
在过去几年，俄罗斯联邦与乌克兰就天然气转口欧洲联盟问题发生几次定价争端，导致输送管道临时关闭，造成欧洲联盟严重短缺情况。