...for with daylight comes danger. 因为危险会与白天一同来临

260. But bats were not the first animals to take to the skies.
     但蝙蝠并不是第一个上天的动物
261. Having spent the night foraging,
     经过了整夜的觅食
262. these fruit bats are in a race to return to the roost...
     这些果蝠竞相返回巢穴
263. ...for with daylight comes danger.
     因为危险会与白天一同来临
264. Birds.
     鸟类
265. They evolved flight long before the mammals.
     进化出飞行技能远早于哺乳动物
266. Faster and stronger than bats...
     比蝙蝠更快更强壮

来自《我们星球上的生命 第一季 第七集 Life on Our Planet S01E07 地球继承者》第 263 行