VOA慢速英语:2021年计划的主要太空任务

mission – n. the flight of a spacecraft to perform a certain task or job

sample – n. a small amount of something that gives information about what it was taken from

probe – n. a vehicle used to examine or observe something closely

layer – n. a level of something spread over an area

asteroid – n. small planets or space rocks that orbit the sun

capability – n. the ability to do a certain job or task

mirror – n. a piece of glass that reflects light or images