VOA慢速英语:美国宇航局的新火箭推迟发射

capsule – n. a small part of a spacecraft that is separate from the rest of the spacecraft and that is where people live and work

stage – n. a particular point or period in the growth or development of something

sustainable – adj. able to last or continue for a long time

schedule – n. a plan of things that will be done and the times when they will be done

dock – v. to join together (two spacecraft) while in space