《晋书·志·第一章》
世世代代相传，史官严守秘密，学者没有看到过，所以宣夜说、盖天说兴旺流行，声势猛烈。
绵代相传，史官禁密，学者不睹，故宣、盖沸腾。
From generation to generation, the official historians have kept strict secrecy, and scholars have not seen it, so Xuan Ye's theory and Gai Tian's theory have been popular and powerful.
<s>[INST] Kindly elucidate the central themes in this passage in English: 绵代相传，史官禁密，学者不睹，故宣、盖沸腾。 [/INST] From generation to generation, the official historians have kept strict secrecy, and scholars have not seen it, so Xuan Ye's theory and Gai Tian's theory have been popular and powerful.</s>
Kindly elucidate the central themes in this passage in English: 绵代相传，史官禁密，学者不睹，故宣、盖沸腾。
user
From generation to generation, the official historians have kept strict secrecy, and scholars have not seen it, so Xuan Ye's theory and Gai Tian's theory have been popular and powerful.
assistant