首先，地球上适宜生命存在的气候取决于极其狭窄的轨道参数，这些参数定义了一个持续可居住的地带，在那里水可以以液态存在。

First, a climate conducive to life on Earth depends upon the extraordinarily narrow orbital parameters that define a continuously habitable zone where water can exist in a liquid state.

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然而，在更北的气候地带，由于实行季节性农耕，回归年变得更加关键。

In more northern climes, however, where seasonal agriculture was practised, the solar year became more crucial.

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这是公司结构中的一个关键部分，目前由于气候变化已进入了一个灰色地带。

It's a key part of the corporate structure, and has now entered a gray area due to climate change.

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