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Unknown
01
an unknown and unexplored region
02
a variable whose values are solutions of an equation
03
anyone who does not belong in the environment in which they are found
例子
Exploring the depths of the ocean, scientists encounter countless unknown species and phenomena.
The path through the dense forest led into the unknown, with no clear markers to guide the way.
The unknown caller left a cryptic message on the voicemail, leaving her wondering about its meaning.
The mysterious artifact found in the ruins remained an unknown object until further research could be conducted.
The explorer ventured into the unknown wilderness, eager to discover what lay beyond.
