The pairing of backbones with jaws was to prove a winning combination. 颌搭配脊椎是胜利的组合

290. Luckily for the ammonoid,
     菊石很幸运
291. the juvenile's jaws are not yet strong enough to break its shell.
     幼鱼的颌尚不够强大 无法咬破它的壳
292. But the adult's are.
     但成年邓氏鱼可以
293. The pairing of backbones with jaws was to prove a winning combination.
     颌搭配脊椎是胜利的组合
294. So perfect that, from this moment on,
     如此完美 以至于从这一刻开始
295. the vertebrates would never look back.
     脊椎动物将永不回头
296. Today, there are more than 30,000 species of fish.
     今天存在超过三万种鱼

来自《我们星球上的生命 第一季 第二集 Life on Our Planet S01E02 第一前线》第 293 行