Astronauts will live and do r_____ work in it

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Astronauts will live and do r_____ work in it

Astronauts will live and do r_____ work in it
Astronauts will live and do r_____ work in it

Astronauts will live and do r_____ work in it
Astronauts will live and do research work in it .
宇航员会在上面生活并进行研究工作.