She had little maternal instinct.

她几乎没有母性。

Her feelings towards him were almost maternal.

她对他的感情几乎是母亲般的。

Maternal smoking can damage the unborn child.

母亲吸烟可能会伤害未出生的孩子。

Likewise the incidence of maternal morbidity is now so low that it makes the papers rather than popular novels.

同样，目前产妇的发病率非常低，畅销小说较少涉及这一话题，只有报纸上才会报道。

Her maternal grandfather was mayor of Karachi.

她的外祖父曾是卡拉奇市的市长。

If, for example, your mother, maternal aunt and sister had breast cancer, you would be in an extremely high-risk category.

例如，如果你的母亲、姨妈以及姐妹患有乳腺癌，那么你将属于极度高危人群。