Muscular and highly versatile, 它们肌肉发达且随机应变

172. it pays to be big.
     大就是好
173. For the smaller ones, there's refuge in the shallows...
     较小的鱼 可以在浅海寻求庇护
174. where their unique lobed fins are a distinct advantage.
     在那里 它们独特的叶鳍是一种明显的优势
175. Muscular and highly versatile,
     它们肌肉发达且随机应变
176. they are different to those of other fish.
     叶鳍与其他鱼的鳍不同
177. Not only do they help them swim...
     不仅有助于游泳
178. but they're strong enough to support their body weight...
     而且足够强壮 能够支撑它们的体重

来自《我们星球上的生命 第一季 第三集 Life on Our Planet S01E03 入侵大地》第 175 行