维特鲁威还为声学增加了一个重大的历史之谜。
Vitruvius also added one of the great historical mysteries to the acoustical literature.
渤海早期都城的位置及形制，一直是个没能揭开的历史之谜。
The location and plan of the early Bohai capital is always a mystery.
伴随着一个一个的奇遇，一场接一场的斗智斗勇，勇敢的奇幻小侠将为你揭开一个隐藏千年的历史之谜。
Gone with the adventures, more and more battles of wits and courageous, our brave thaumaturgy little knight-errant will uncover a history riddle which had hided about a thousand years.
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