President Obama says Russia is continuing its "aggression" against Ukraine, _________________________________________. The European Union decided Monday to delay imposing sanctions on additional Ukrainian separatists and Russians to await the outcome of a four-nation summit on the Ukraine conflict Wednesday in Minsk. 奥巴马总统表示俄罗斯仍在继续侵犯乌克兰，他们对分裂主义分子_____________________________________。欧盟周一决定暂缓对乌克兰分裂主义分子和俄罗斯的制裁，他们需要在于周三在明斯克举行的关于乌克兰冲突的四国峰会结果出来之后再做决策。
