1) One does not have to stand on ceremony in dealing with close relatives and friends
至亲无文
5) the thought that all the relationships between parents and their sons are not consanguineous
亲子无亲
补充资料：至亲
①指血统关系最亲近的戚属，也指其他关系很亲密的人：骨肉至亲｜至亲笃好｜天下至亲，不过兄弟。②最亲密：夫子母之性，天道至亲。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条