VOA慢速英语:美国指责伊朗袭击了阿曼湾的油轮

proficiency –n. the ability to do something well

sophistication –n. having a lot of experience and knowledge about a subject such as technology or art

tanker - n. ship that is designed to carry liquid, like oil

drone - n. small aircraft that flies without a pilot

enrichment - n. process of increasing natural uranium for nuclear use

sanction - n. action taken to force a country to obey international laws by limiting or stopping trade with that country