麻烦帮忙分析句子结构、成分.In the arena of space research,live animals are still practical alternatives on a flight not considered to be sufficiently safe for human astronauts.
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麻烦帮忙分析句子结构、成分.In the arena of space research,live animals are still practical alternatives on a flight not considered to be sufficiently safe for human astronauts.
麻烦帮忙分析句子结构、成分.
In the arena of space research,live animals are still practical alternatives on a flight not considered to be sufficiently safe for human astronauts.
麻烦帮忙分析句子结构、成分.In the arena of space research,live animals are still practical alternatives on a flight not considered to be sufficiently safe for human astronauts.
In the arena of space research,(地点状语)live animals (主语)are (谓语)still practical alternatives (表语)on a flight (地点状语)not considered to be sufficiently safe for human astronauts(做flight的定语)
In the arena of space research地点状语
live animals 主语
are谓语系动词
practical alternatives 表语
on a flight地点状语
关键not considered to be sufficiently safe for human astronauts是a flight的定语
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In the arena of space research地点状语
live animals 主语
are谓语系动词
practical alternatives 表语
on a flight地点状语
关键not considered to be sufficiently safe for human astronauts是a flight的定语
considered 过去分词表被动
你也可以把这个定语看成省略了which is的定语从句
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In the arena of space research状语live animals 主语are系动词still practical alternatives on a flight not considered to be sufficiently safe for human astronauts.表语