慢速英语:美国宇航局探索月球和火星的生存空间

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veteran – adj. long in experience or service

habitat – n. the natural living environment for living things

prelude – n. something that happens before another event or activity

inflatable – adj. able to be filled with air

toilet – n. a deep, round container that you sit on or stand near when releasing wastes from your body

reconfigure – v. to change the structure of something

RV – n. short for recreational vehicle (a large motor vehicle in which you can sleep and often cook)

virtual reality – n. a set of images and sounds produced by a computer to represent a real place or situation