《史记·七十列传·太史公自序》
从前颛顼统治天下时，任命南正重掌管天文，北正黎掌管地理。
昔在颛顼，命南正重以司天，北正黎以司地。
Formerly when Chwan-hsu ruled the world, he appointed Chong, the Commissioner of the South, to take charge of astronomy, and Li, the Commissioner of the North, to take charge of geography.
<s>[INST] Translate the following Classical Chinese text into modern Chinese: 昔在颛顼，命南正重以司天，北正黎以司地。 [/INST] 从前颛顼统治天下时，任命南正重掌管天文，北正黎掌管地理。</s>
Translate the following Classical Chinese text into modern Chinese: 昔在颛顼，命南正重以司天，北正黎以司地。
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从前颛顼统治天下时，任命南正重掌管天文，北正黎掌管地理。
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