Scientists first posed this question in the mid-1990s, after researchers came upon a chemical agent that in rodents seemed to reproduce many of caloric restriction's benefits.

科学家首次提出这个问题是在20世纪90年代中期。当时，研究人员偶然发现一种化学药剂，这种药剂在啮齿动物身上似乎可以发挥和热量限制相同的正面效果。

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But that was in rodents.

不过这些都是啮齿动物。

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Some studies have linked saccharin to cancer in rodents.

一些研究显示糖精和啮齿动物的癌症有关。

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It showed that a treatment called dorsal column stimulation could re-establish movement in rodents with Parkinson's-like problems.

VOA: special.2009.04.07

Earlier entrants from Merck and Ranbaxy were scrapped because they caused cancer in rodents.

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Lincolnshire has seen a surge in rodents spotted near people's homes according to a pest controller.

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Many scientists believe that the biological mechanism by which phthalates cause illnesses in rodents does not operate in humans.

ECONOMIST: The environment