While they crouch in their dens, or lie in wait in the thicket?当狮子伏于洞穴，卧于丛林埋伏的时候。Female bears tend to line their dens with leaves or grass.母熊往往会在洞穴里垫些树叶或草。Although raccoons may lie up in their dens during the winter they do not actually hibernate.浣熊冬天虽然躲在巢穴里，但实际上并没有冬眠。