in the second place,in the arena of space research,live animals are still practical alternatives onin the second place,in the arena of space research,live animals are still practicalalternatives on a flight not considered to be sufficiently safe for

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inthesecondplace,inthearenaofspaceresearch,liveanimalsarestillpracticalalternativesoninthesecondplac

in the second place,in the arena of space research,live animals are still practical alternatives onin the second place,in the arena of space research,live animals are still practicalalternatives on a flight not considered to be sufficiently safe for
in the second place,in the arena of space research,live animals are still practical alternatives on
in the second place,in the arena of space research,live animals are still practical
alternatives on a flight not considered to be sufficiently safe for human astronauts.
怎么翻译?

in the second place,in the arena of space research,live animals are still practical alternatives onin the second place,in the arena of space research,live animals are still practicalalternatives on a flight not considered to be sufficiently safe for
其次,在太空研究领域,当太空飞行对宇航员来说安全性不够时,活体动物仍然是宇航员的实际操作中的代替品.