VOA慢速英语:US Space Agency Prepares for Asteroid Meet-up(翻译)

spacecraft – n. a vehicle that is used for travel in outer space

asteroid – n. any one of thousands of small planets that circle around the sun

bow tie – n. a narrow length of cloth that is worn by men around the neck and tied into a bow at the throat

precursor – n. something that comes before something else and that often leads to or influences its development

solar system – n. our sun and the planets that move around it