The festival's origin is a mystery to many people.

这个节日的起源对许多人来说是一个谜。

同一单元的其他句子

• The ancient city of Rome was the center of a vast empire.古罗马城是一个庞大帝国的中心。
• Did you know that the Great Wall was built over many dynasties?你知道长城是经过许多朝代修建的吗？
• Our school's history club is organizing a trip to the museum.我们学校的历史俱乐部正在组织去博物馆的旅行。
• The tradition of giving red envelopes is still popular in China today.给红包的传统在今天中国仍然流行。
• Many ancient customs have been passed down from generation to generation.许多古代习俗代代相传。