《明史·志·卷一》
璇玑、玉衡是用仪器观测天象的开始，然而不被三代所使用。
璇玑玉衡为仪象之权舆，然不见用于三代。
Xuanyi and Yu Heng were the beginnings of using instruments to observe celestial phenomena; however, they weren’t used in the Three Dynasties.
<s>[INST] Translate the following Classical Chinese text into English: 璇玑玉衡为仪象之权舆，然不见用于三代。 [/INST] Xuanyi and Yu Heng were the beginnings of using instruments to observe celestial phenomena; however, they weren’t used in the Three Dynasties.</s>
Translate the following Classical Chinese text into English: 璇玑玉衡为仪象之权舆，然不见用于三代。
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Xuanyi and Yu Heng were the beginnings of using instruments to observe celestial phenomena; however, they weren’t used in the Three Dynasties.
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