Soon, almost every ostrich has its own passenger. 很快 几乎每只鸵鸟都有了自己的乘客

123. What about an ostrich?
     鸵鸟怎么样
124. The heaviest bird of all.
     它们是体重最大的鸟类
125. This time there's more than enough transport to go around.
     这次有足够的交通工具了
126. Soon, almost every ostrich has its own passenger.
     很快 几乎每只鸵鸟都有了自己的乘客
127. But free riders are only tolerated for so long.
     不过搭便车的也得意不了多久
128. What the bee-eaters really need
     蜂虎真正需要的
129. is a creature so big it won't even notice them.
     是体型大到根本注意不到它们的动物

来自《行星地球 第二季 第五集 Planet Earth S02E05 草原》第 126 行