mother and father加起来是什么单词

mother and father加起来是什么单词？

mother and father加起来是parents(父母亲)。类似的说法很多，例如： boys and girls加起来是pupils/students(学生们), chickens and ducks加起来是poultry (家禽), bread and butter加起来可以指work, 尤其是某人赖以生存的work, 例如： Writing is my bread and butter.写作是我谋生的手段。

my mother and father are old 意思是：我父亲和母亲年老了。