和谐英语

VOA慢速英语:科学家们正在研制蒸汽驱动的宇宙飞船

2019-01-17来源:和谐英语
Words in This Story

tremendous – adj. extremely good

propellant – n. fuel that causes something to move

expensive – adj. costing a lot of money

allow – v. to permit

potential – n. an ability that has not yet been developed