arcane

The professor spent his life studying the arcane symbols found in ancient Egyptian tombs.

(Chinese) 这位教授一生致力于研究古埃及坟墓中发现的神秘符号。

The computer manual was filled with arcane technical terms that confused the average user.

(Chinese) 电脑手册中充斥着晦涩的专业术语，让普通用户感到困惑。