An enigma; a puzzling mystery difficult to understand or explain.
那个古老的雕塑到底是如何建造的，至今仍是一个难解之谜
How that ancient sculpture was built remains an unsolved mystery to this day.
Era:
Modern
Frequency:
Next Idiom
An enigma; a puzzling mystery difficult to understand or explain.
Era:
Modern
Frequency: