模仿文本：  

But first Ukraine has accused Russia of carrying out an armed invasion after what it described as units of the Russian Black Sea Fleet surrounded an airport near the Crimean city of Sevastopol. The Ukrainian Interior Minister Arsen Avakov said armed men in uniform but without identifying insignia were patrolling outside. 

 

译文：  首先，乌克兰称俄罗斯黑海舰队的军事单位在包围克里米亚城市——塞瓦斯托波尔的一座机场后展开武装入侵，乌向俄方表示谴责。乌克兰内政部部长阿森·艾瓦科夫说，在外面巡逻的是一群身着制服但未验明军队徽章的武装士兵。