hibernate/hibernation

hibernate /ˈhaibəneit/ vi. （某些动物）冬眠：Some bears hibernate.有些熊冬眠。The turtle hibernates in a shallow burrow for six months of the year. 海龟一年在一个浅洞中冬眠六个月。

hibernation n. [u] 冬眠：Bears wake up in the spring after a winter of hibernation.熊经过一个冬天的冬眠后在春季苏醒。At the first cold of autumn, many insects go into hibernation.入秋第一阵寒潮刚到，许多昆虫就进入了冬眠。