性知识;生育常识
details about sexual activity and the way that babies are born
He decided to have a talk with his son about the facts of life.
My school was woefully inadequate when it came to teaching us the facts of life.
She was 17 before anyone told her the facts of life.
He begged his parents to tell him the facts of life but they refused.
I take it you are familiar with the facts of life?
See also: fact