问题描述：
下面这句话中括号里的it指代的是earth还是position.各路英语达人帮忙看一下,
This is primarily the result of the unique position Earth occupies in the solar system,as (it)is not too close or too far away from the sun to upset the delicate temperature requirements of life.而且,这句话的主语是earth还是position啊?
This is primarily the result of the unique position Earth occupies in the solar system,as (it)is not too close or too far away from the sun to upset the delicate temperature requirements of life.而且,这句话的主语是earth还是position啊?
问题解答：
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