女婿 son-in-law;
媳妇daughter-in-law
姊夫/妹夫 brother-in-law;
嫂子 sister-in-law;
堂兄弟姊妹cousin;
独生子only son;
血亲 blood relative;
单亲 single parent
继子 stepson;
继女 stepdaughter;
亲生父母 birth parents;
养父母 adoptive parents ;
寡妇 widow ;
鳏夫widower ;
外公 grandfather;
外婆 grandmother;
养父母adoptive parents;
养子adopted child
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