Methods: With a two-generation reproductive test, we observed the offspring's kidney under the electron microscope, of which their parents exposed to different doses of fluoride and arsenic.

方法：采用两代一窝繁殖试验的方法，对染毒大鼠子代肾组织进行超微结构观察。

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Talk to anyone who's a generation or two older, and they would most likely comment that children are more spoiled these days.

和年长一代或两代的人交谈，他们很可能会说现在的孩子更娇惯了。

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"Two-point-four billion dollars in highly competitive grants to develop the next generation of fuel-efficient cars and trucks, powered by the next generation of battery technologies all made right here in the U.S.of A,"

VOA: standard.2009.08.05

He said the company was surprised by the level of demand for the two-generation-old iPhone 4 in the fourth quarter.

WSJ: Apple Calls Proxy Fight a 'Silly Sideshow'

Mr. Cook said the company was surprised by the level of demand for the two-generation-old iPhone 4 in the fourth quarter.

WSJ: Apple Defends Position on Cash

The quintet is a two-generation band, with Lake's sons Gene (on drums) and DJ Jahi Sundance (on turntables), along with Freddie Hendrix on trumpet and organist Jared Gold.

NPR: Family Jazz: Gerald Clayton And Oliver Lake