Mothers show the cubs what to do about this. 母熊给小熊们做了示范
The mothers pick out the safest way down. 母羊选出一条最安全的下山路径
but those that survive will, eventually, as their mothers did before them, 活下来的海龟最终还会做它们的母亲做过的事情
King chicks are dependent on their mothers for over a year and this puts a great deal of pressure on the parents. 小帝企鹅必须依靠它们的母亲至少一年 这给它们父母带来巨大的压力
but their mothers have made this journey before 不过它们的母亲以前也经历过这种旅行
The future of an entire species hangs on survival of a tiny number of mothers like this one. 整个物种的未来寄托在为数不多的几只母豹身上 就好比这一只