"We've known for a long time that maternal education is important," says John Cleland of the London School of Hygiene and Tropical Medicine.

伦敦卫生与热带医学学院的约翰·克莱兰说：“我们早就意识到了产妇教育的重要性。”

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There is already some evidence suggesting that the ringed seal, a phocids species that is similar in size to the harbor seal, may also use a maternal foraging strategy.

已经有一些证据表明环斑海豹，即一种体型与港海豹相似的海豹科物种，可能也会使用母性觅食策略。

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I didn't have as strong a maternal instinct as some other mothers.

我不像其他一些母亲那样有那么强烈的母性本能。

《柯林斯英汉双解大词典》

The researchers say the maternal death rate has been falling almost one and a half percent a year since nineteen ninety.

VOA: special.2010.04.14

These cells around the outside form the interface, the placenta, where the maternal blood circulation meets the embryonic circulation and nutrients are passed back and forth that way in a very highly regulated and important way.

外层的细胞形成接触面,即胎盘,是母血与胎血,进行血液交换,及营养物质交换的场所,整个过程高度有序并且非常重要

耶鲁公开课 - 生物医学工程探索课程节选

In "Maternal Caress," a few simple lines express the deep love of a mother for her child.

VOA: special.2009.07.12

Its carved visage had become -- solely through its loss -- a rare totem of maternal love, a saint's venerated bone.

CNN: Stranger's unexpected generosity makes a big impression

The son and grandson of immigrants (his father was Hungarian, his maternal grandfather a Jew from Salonica), he advocated affirmative action to build ladders out of the banlieues.

ECONOMIST: France's presidential election

Ms. Vuolo, a saleswoman in publishing, says she envies her husband a little, because he doesn't share what she sees as a maternal burden the pressure to be a perfect homemaker.

WSJ: At-Home Dads Make Parenting More of a 'Guy' Thing