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This is our planet, the Earth.
这是我们的星球，地球
It's unique in the solar system,
太阳系中独一无二的
perhaps even in the universe.
甚至可能是宇宙中
My name is Iain Stewart
我是斯图尔特
and I want to show you how our planet works.
我将向你展示我们的地球是怎么运作的
I am exploring ice.
我将要探索冰川
Ice may be nothing more than frozen water
冰川无非就是冰冻的水
but it holds extraordinary power.
但是它有特别的力量
Since human beings have been on the planet
自从地球上有了人类
nothing has done more than ice to shape our world.
没有事物比冰川在塑造地球方面做的更多
It has carved the landscape,
它雕刻了景观
unleashed terrible catastrophes
释放可怕的灾祸
and ice has helped drive the climate of the whole planet.
冰川还影响整个星球的气候
It's even changed the course of human evolution,
它甚至改变人类进化的进程
yet it may also threaten our future.
它当然也会威胁我们的未来
Only now are we beginning to understand the power of this remarkable substance.
现在让我们开始了解这种非凡力量的实质
Welcome to the world of ice.
欢迎来到冰封世界
