The rays are surrounded. 蝠鲼群被包围了

145. It will take teamwork,
     而是需要团队合作
146. and that is today's lesson.
     而这正是这节课的主题
147. The young orca are quick to catch on.
     年轻的虎鲸理解的很快
148. The rays are surrounded.
     蝠鲼群被包围了
149. They dive...
     它们迅速下潜
150. ..only to be forced back up again by the experienced female.
     却被经验丰富的雌虎鲸逼回海面
151. And now, with the exhausted rays trapped against the surface,
     精疲力竭的蝠鲼无路可逃

来自《行星地球 第三季 第二集 Planet Earth S03E02 海洋》第 148 行