translation.en: But I knew that there were examples of creatures, also mammals, that do reduce their metabolic rate such as ground squirrels and bears, they reduce their metabolic rate in the wintertime when they hibernate.
translation.zh: 但我知道就有这样 生物的例子，包括哺乳动物， 可以减少其代谢率 如地松鼠和熊。 它们可以在冬眠的时候 降低代谢率。