but with swamp under foot, they can't get any traction. 但沼泽太过湿滑 脚底无法借力

66. One distracts the bull up front,
    一头母狮正面诱敌
67. while her sisters attack from behind.
    她的姐妹从后方进攻
68. The cats must somehow topple the buffalo,
    母狮们必须想办法压倒公牛
69. but with swamp under foot, they can't get any traction.
    但沼泽太过湿滑 脚底无法借力
70. The bull is weakening,
    公牛逐渐虚弱
71. but the lions are tiring, too.
    但狮群也露出疲态
72. It's now a battle of will as much as strength.
    现在是体力与毅力的双重考验

来自《行星地球 第二季 第五集 Planet Earth S02E05 草原》第 69 行