The running wheel of the control group was fixed.

跑笼固定不转。

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The third group consisted of regular laboratory mice that had a running wheel.

第三组由有转轮的来自正规实验室的老鼠组成。

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Some of the animals had fat surgically removed, while others were encouraged to stay slim by exercising on a running wheel. Both cases showed increased levels of cancer cell death.

通过手术把一些鼠的脂肪去除，而促使其他鼠通过一个运动轮来锻炼减肥，这两组鼠都表明能增加癌细胞死亡的水平。

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Or, you can choose to keep working non-stop like a hamster running on a wheel that keeps going faster and faster.

CNN: Take your vacation, or die?

"Enough hamsters running on a wheel could displace a power plant, but no one's going to do it, because it's too expensive, " he says.

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The open-wheel series is running a second, full-length race in the same weekend for the first time Sunday when Conway will start up front for the first time in his career.

NPR: Conway Wins 1st Of 2 Races At Detroit Grand Prix