The main herd has already got there safely. 大部队早已安全抵达
so now animals can collect their share of the energy that has come from the sun. 因此动物们也能获得 太阳馈赠给它们的那部分能量
and the mother has led her cubs a mile from the den. 母熊已经带领幼熊离巢1英里远
Their mother has not eaten for five months 它们的母亲已有5个月没有进食了
She has been in her den the whole winter. 整个冬天 它都在洞穴里度过