a strange secret nature or quality
sth which cannot be explained or understood
a person about whom not much is known or can be found out
"how it got out is a mystery"
"it remains one of nature's secrets"
The Mysteries of the Christian Religion.
He remained a mystery in my childhood.
出自： M. Angelou
The neurophysiology of language remains almost a total mystery.
出自： N. Chomsky
Or debate with learned rabbis the mysteries of the Cabbala.
出自： B. Chatwin