and the eagle has to struggle to control it. 金雕不得不努力控制飞行

306. It escapes the touches of one,
     它躲过了其中一只的追捕
307. and is caught by another.
     却没能逃过另一只的利爪
308. But even a young crane is a heavy prize
     一只小鹤的份量也是挺重的
309. and the eagle has to struggle to control it.
     金雕不得不努力控制飞行
310. The mother can wait no longer -
     母鹤可不能等得太久
311. this is a desperate race against worsening weather.
     这是一场与恶劣气候的死亡赛跑
312. The rest of the flock battle on.
     鹤群其它成员开始背水一战

来自《行星地球 第一季 第二集 Planet Earth S01E02 山地》第 309 行