a mother fixation的用法和样例：
- A mother naturally feels protective towards her children.
- She is a mother of five children.
- My brother- in- law is just a pansy because he is a mother's boy.
- The state of being a mother; motherhood.
母亲身份; 母道作为母亲的状态; 母道
- A mother mustn't favor one of her children more than the others.
- She watched over us like a mother hen over brood.