英语翻译
1.We will focus our future research aboard this station on the long-term effects of space travel on human biology.
2.we have much to learn about their long-term effects before human crews can venture through the vast voids of space for months at a time.
3.To meet this goal,we will return the Space Shuttle to flight as soon as possible,consistent with safety concerns and the recommendations of the Columbia Accident Investigation Board.