It spends it's days hiding four hundred meters down 白天它躲在400米深的海底

195. sustained by the nutrients and detritus in the icy currents that flow around the peak.
     得益于洋流持续不断地携带养分从这里流过
196. Yet it is all blossoming on an extinct volcano, a mile below the reach of the Sun.
     这些生物在这座死火山的的繁荣地点, 离阳光照射到的地方还有1英里呢
197. A nautilus.
     鹦鹉螺
198. It spends it's days hiding four hundred meters down
     白天它躲在400米深的海底
199. But as night falls, it ascends up to the reefs, to look for food.
     到了晚上,它就游上来 到珊瑚礁附近寻找食物
200. It's graceful shell contains gas filled floatation chambers,
     它那优美的外壳由充满空气的小室组成
201. that control it's depth.
     使它可以控制深度

来自《行星地球 第一季 第十一集 Planet Earth S01E11 海洋深处》第 198 行