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・a whole brother [sister] 父母の同じ兄弟[姉妹] (cf. half brother, half sister).🔗🔉

・a whole brother [sister] 父母の同じ兄弟[姉妹] (cf. half brother, half sister).

研究社新英和大辞典 ページ 234550 でのcf. half brother, half sister単語。