They spend the next weeks training to prepare their bodies for the extreme altitude.

他们在接下来的几周里进行训练，为自己的身体应对极端海拔做好准备。

Life at extreme altitude has shaped some of the toughest animals on the planet.

极高海拔之上的生存，塑造出了这个星球上最顽强的动物。

The closest most people would get to at this extreme altitude would be flying in an aeroplane.

绝大多数人只有在搭乘飞机时才能到达这一极限高度。

" Clearly, the mice that are living at these extreme altitudes have physiological capacities that are very different from your typical rodent."

“很明显，生活在这些极端海拔的老鼠，其生理机能与普遍的啮齿动物大不相同。”

So when we go, for example, at the high altitude to extreme altitudes, extremely low levels of oxygen, we get this increase in flow.

所以当我们从高海拔到极低海拔，极低的氧气水平，我们的流量就会增加。

The extreme altitude meant that any missiles fired would have a very difficult time maneuvering, as they rely on fins to adjust their course as they fly through the air.

极端的高度意味着发射的任何导弹都很难机动，因为它们在空中飞行时依靠鳍来调整航向。