剑桥词典a child who is born with particular genes that have been chosen in order to treat an older brother or sister who has a disease 兄姐救星（生來就有某些特殊基因的孩子，這些基因是經過特別選擇的，用於治療孩子罹患絕症的哥哥或姐姐） 返回 saviour sibling