I've never understood that. I thought they were half - brothers and half - sisters.

我还是一点都不明白. 我以为他们是同父异母或同母异父的兄弟姐妹.

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He discovers that his 2 sisters and brother are in fact half sisters brother.

他发现,他的2个姐妹和兄弟是实际上是同父异母的姐妹兄弟.

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The two half - sisters look alike.

这两个隔山姐妹长得很像.

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