猜谜语：Two tathers and two sons went to a bookstone.They bought three books.Every has a book.Why

晕,爷孙三个嘛!
爸爸和爷爷父子两,爸爸和儿子又是父子两,买三本书正好噻!
grandfa,father and son!
Is it right?

because they are grandpa,father dan grandson

因为他们是爷爷、爸爸和孙子。

father is son

你的英文那么差还拿来炫耀,白痴

儿子 爸爸 爷爷，2对父子
祖孙三代