is simply not enough for both of them. 根本不足以满足这对母子的需要

107. She's desperate for water.
     雌狒狒非常迫切的需要水
108. Without it, she can't produce milk.
     没有水 它便无法产奶
109. The tiny of amount of moisture in her food
     食物中含有的少量水分
110. is simply not enough for both of them.
     根本不足以满足这对母子的需要
111. The troop must constantly search for water.
     狒狒群必须不断寻找水源
112. And they won't wait for her.
     不会为了雌狒狒停下脚步
113. At last, one of the troop's scouts finds a tiny trickle on a rock face.
     终于 一只狒狒在岩石表面发现了一条细流

来自《行星地球 第三季 第三集 Planet Earth S03E03 沙漠与草原》第 110 行