VOA慢速英语:美国宇航局寻求人们进行隔离研究 为月球和火星做准备

isolation – n. the state of being separate from other people, places or things

mission – n. an important task, usually involving travel somewhere

aspect – n. one part of a situation, problem, subject, etc.

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

simulation – n. a recreation of a process or situation