5 the edge of our galaxy—arching overhead的理解与翻译
下面的东西摘自 2015 年浙江卷的阅读理解第 C 文，不太理解画线部分，求教专家连贯翻译一下：
Living in a glare of our own making, we have cut ourselves off from our evolutionary and cultural heritage—the light of the stars and the rhythms of day and night. In a very real sense, light pollution causes us to lose sight of our true place in the universe, to forget the scale of our being, which is best measured against the dimensions of a deep night with the Milky Way—the edge of our galaxy—arching overhead.
最佳答案 2020-06-03 21:01
... to forget the scale of our being, which is best measured against the dimensions of a deep night with the Milky Way—the edge of our galaxy—arching overhead.
which引导定语从句，修饰the scale of our being.
with the Milky Way—the edge of our galaxy—arching overhead 为with复合结构，作定语修饰 a deep night。二个破折号相当于括号，是对the Milky Way的补充说明。即银河是我们所在的星系的边缘。
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