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Our world is constantly reshaped by a never ending battle
一场永无终结的战争 持续塑造着我们的世界
between the earth's inner heat that push the land up
一方是地球的内热 他不断推动土地隆起
and the forces of erosion that wears it down.
另一方是侵蚀土地的力量
but Earth's inner head
但是地球内部热能
has made a profound difference to our planet in another way,
以另外一种方式使地球发生着巨大的变化
Perhaps the most important way of all.
也许也是最重要的方式
It began around 4 billion years ago.
从40亿年前开始
This is Rotorua, in the north island of New Zealand.
这是位于新西兰北部岛屿的罗托鲁阿
It is one the most volcanically active place on he planet,
地球上火山运动最活跃的地方之一
possibly similar to Earth millions of years ago.
可能数百万年前的地球也是类似的
To us, the young Earth would be a hellish place.
年轻的地球对人类而言，宛如地狱
but ironically, this volcanic activity helped to create the right conditions for the most important change in the history of our planet.
讽刺的是，正是这样的火山活动为地球 历史上最重要的变化，创造了合适条件。
