"What don't you understand, popkin?" asked Aunt Petunia, looking up at her son.

“有什么不明白的，宝贝？”佩妮姨妈抬头看着儿子问。

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Popkin proposes two possible ways of using taxes to motivate people to lose weight.

鲍普金提出了两条可行的使用税收激励人们减肥的方法。

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According to Popkin, 1.3 billion people are overweight while 800 million are underweight.

根据波普金的调查，全球有13亿人超重，而只有8000万人体重偏轻。

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Professor Popkin says American schools also need to improve their nutrition.

VOA: special.2010.03.17

Nutrition professor Barry Popkin was the lead investigator.

VOA: special.2010.03.17

Popkin and his team based their estimate on a 20-year longitudinal study that included more than 5, 100 participants.

FORBES: Cheap Foods That Are Good For You

"It's kind of a mind-boggling set of numbers, " said Barry Popkin, the program's principal investigator.

WSJ: Smaller Size? No Thanks to This Pledge

Father was Max Popkin, a fashionable painter whose portraits of New York notables fetch good prices these days at auction.

ECONOMIST: Bluma Trell