Vast areas of our ocean are yet to be explored. 海洋中还有广阔的区域尚未探索
The least known parts of it are its great depths. 这之中最不为人知的区域是海洋深处
This family are the only orca known to hunt rays like this... 这一家子是已知的虎鲸群中 唯一用这种方式捕猎蝠鲼的
The young orca are quick to catch on. 年轻的虎鲸理解的很快
The rays are fast and can outmanoeuvre an orca. 蝠鲼的速度很快 甚至快于虎鲸
Other creatures, however, are also listening. 然而 听到声音的还有其他生物
Columbus crabs are not good swimmers, so this male is marooned. 哥伦布蟹并不擅长游泳 因此这只雄蟹走投无路