Most early mammals didn't have armor or size to protect them... 多数早期哺乳动物 没有护甲来保护它们

251. until they reach independence.
     直到其独♥立♥
252. But for these nervous little youngsters...
     但对于这些紧张的幼崽们来说
253. that might take a while.
     这可能需要一段时间
254. Most early mammals didn't have armor or size to protect them...
     多数早期哺乳动物 没有护甲来保护它们
255. yet just like in today's forests...
     但就像今天的森林中一样
256. danger was never far away.
     危险永远不会离得太远
257. The discarded skin of their ancient adversary.
     它们古老对手的蜕皮

来自《我们星球上的生命 第一季 第五集 Life on Our Planet S01E05 巨兽阴影下》第 254 行