When the rats' offspring were six weeks and three months of age, scientists gave them the choice of eating regular food (the chow) or the same "junk food" certain mothers ate.

当老鼠子女六个星期或三个月大的时候，科学家分别提供正常的食物(鼠粮)或他们母亲曾吃过的垃圾食品供他们选择。

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The rich world's growing army of single mothers have little choice but to work.

发达国家逐渐增加的单身妈妈群体必须选择工作。

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Plastic baby bottles have been the popular choice of mothers for many years.

很多年来，很多母亲一直喜欢使用塑料瓶。

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The Great Recession gave some mothers no choice but to work, as job cuts hit hard at men.

VOA: special.2010.04.23

She found her answer -- talk about it early and often -- through someone in the widespread network, Single Mothers by Choice.

CNN: Out-of-wedlock births hit record high

She renovated, began hosting parties, went freelance, tried Internet dating, and made contact with Single Mothers by Choice, a support organization for unattached women hoping to raise a child.

NEWYORKER: The Disconnect

While she and many other single mothers by choice can afford this option, David Popenoe worries about the example they're setting in a society where children still benefit most from married parents, he said.

CNN: Out-of-wedlock births hit record high