The lions must wait for the oryx to leave the safety of the dunes, 狮子必须耐心等待 长角羚离开安全的沙丘
which eventually they must to find food and water. 因为它们最后总得寻找食物和水
the lions must travel great distances to find enough to live on. 狮子也必须长途跋涉 寻找生存所需的食物
Clearly there must be something else that takes the place of rain. 显然 这里必须有其它东西 能代替雨水的作用
By midday the radiation is so intense they must take shelter. 到了正午 太阳的炙焰 迫使它们不得不寻找庇荫处
And the red kangaroos must acknowledge that. 红大袋鼠必须意识到这一点
The camels must limit themselves to the equivalent of just 10 litres a day. 骆驼必须限定自己 每天只能吃10升左右的雪
must wear respirators and carry monitors. 必须戴上防毒面具 并携带通话器
so these species must have been isolated for a very long time. 所以这些物种必定 与世隔绝了相当长的一段时间
This is the price that these cave commuters must pay 这是洞栖动物必须付出的代价