伊朗表示将推出核协议

tanker – n. a huge ship, truck or airplane specially made to carry materials such as oil or fuel

enrichment –n. to increase the quality of something or increase its usefulness

countdown –n. a period of time before an important event takes place: such as a launch or reaching a goal

reserve –n. a supply of something to be used at a later time

commercial –adj. related to buying or selling goods

navigation –n. the act of moving a boat or ship over an area of water

role –n. the part someone or some group plays in an event or situation