and to breed. 繁育后代

244. ...all perfectly adapted to the challenges of life.
     它们全都完美地适应了生命的挑战
245. The struggle to protect and raise one's young,
     努力保护并养育幼崽
246. to find food,
     寻找食物
247. and to breed.
     繁育后代
248. The cast of characters may have changed,
     角色阵容也许已经改变
249. but the essentials remain the same.
     但关键因素依然相同
250. Water and the energy from the Sun
     水与来自太阳的能量

来自《我们星球上的生命 第一季 第一集 Life on Our Planet S01E01 生命法则》第 247 行