uncle:the brother of one's father or mothersister:a girl or a woman who has the same parents as another personmother:children to whom she has given birthfather:a person's male parentparent:a person's mother or fatherbrother:a man or boy who has the same parentsas another persongrandmother:a female grandparentgrandfather:a male grandparentgrandparent:a parent of one's mother or fatherson:a male childdaughter:a female childaunt:the sister of one's father or mothercousin:the child of your aunt or uncle这些是牛津英语解释,比较简单的了,希望能帮到你