1 N-COUNT (令人不快却又无法改变的)生活现实 You say that something which is not pleasant is a fact of life when there is nothing you can do to change it so you must accept it. (令人不快却又无法改变的)生活现实
2 N-PLURAL (教给儿童的)性知识 If you tell a child about the facts of life, you tell him or her about sexual intercourse and how babies are born. (教给儿童的)性知识