society became more complex... 社会变得更加复杂

277. Freed from the constant battle to find food,
     由于不用再为寻找食物而不断争斗
278. human populations grew,
     人口增长
279. work diversified,
     工作多样化
280. society became more complex...
     社会变得更加复杂
281. and civilizations were born.
     文明就此诞生
282. We achieved something no other species has ever done.
     我们做到了其他物种从未做到的事
283. We broke free of nature and rose above it.
     我们摆脱了大自然的束缚并将其超越

来自《我们星球上的生命 第一季 第八集 Life on Our Planet S01E08 冰与火的世纪》第 280 行