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

151. And now, with the exhausted rays trapped against the surface,
     精疲力竭的蝠鲼无路可逃
152. she attacks...
     雌虎鲸发动进攻
153. ..and the young ones follow her lead.
     年轻虎鲸则紧跟它的脚步
154. 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
155. ..and they are lethally efficient.
     而且效率十分之高
156. But it appears that school is over for today.
     但似乎今天的课程到此为止了
157. For a few battle-scarred survivors,
     这些幸存下来的伤痕累累的蝠鲼

来自《行星地球 第三季 第二集 Planet Earth S03E02 海洋》第 154 行