VOA慢速英语:在联合国会议之前 美韩日展示空军力量

sanction –n. measure put in place to cause a country to obey international law, usually by limiting or banning trade

theater –n. an area, such as a large geographical area, where action takes place

options –n. two or more possible actions that can be chosen from

maneuvers –n. a set of planned movements or actions by military groups meant to show and develop skill