他们即使在很冷的天气里也可保持正常体温。
They can keep up their normal body temperature even in very cold weather.
研究人员将一组老鼠的体温升高到103华氏度，另外一组保持正常体温- - -大约是人体温度。
Researchers warmed up one group of mice to body temperatures of about 103 degrees Fahrenheit. They left another group at normal core temperature-about the same as ours.
他们生活得很活跃，即使在严寒的冬天也能保持正常的体温。
They lead an active life which keeps up their body temperature even in very cold winter weather.
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