我们都听说过孤独而英勇的探险家的故事，但是在地球上许多不同地方引导和保护欧洲探险家的当地人呢？
We have all heard tales of lone, heroic explorers, but what about the local individuals who guided and protected European explorers in many different parts of the globe?
但《未来的物理》使地球看起来就像一个孤独的行星，正向着它那既令人神往又让人恐惧的宿命疾走猛冲。
But "Physics of the Future" makes Earth seem like a very lonely planet, hurtling toward a destiny both exhilarating and dire.
这里想表达的观点是，当地球从行星胚胎间相互碰撞缓慢形成时，火星却是一个孤独的行星胚胎，在太阳系历史上形成得很早。
The idea here is that - while Earth formed slowly from planetary embryos colliding - Mars is itself a solitary planetary embryo that formed very early in the history of our solar system.
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