如果指的是一样事物,是单数概念.
如:Butter and bread are two important materials to make butter and bread,which is what Americans usually have for breakfast.
你上面的句子用复数的
如果指的是一样事物,是单数概念.
如:Butter and bread are two important materials to make butter and bread,which is what Americans usually have for breakfast.
你上面的句子用复数的