___________________________________________________The coalition, backed by Saudi Arabia, has been pressing for an end to the bombardment and siege of civilian areas before any negotiations with President Assad's government. U.N. efforts to convene the talks come as Syrian government forces have been making advances on the battlefield with the support of Russian airstrikes. __________________________________________________________沙特支持反对派希望在与阿萨德政府谈判之前结束对城镇的封锁轰炸.因俄方空袭支持,联合国能够促成此次谈判也要归功于政府军的节节胜利.