unknown
Trung cấp 2 · B2adjectiveOxford Dictionary
- A previously unknown group claimed responsibility for the bombing.
- He was trying, for some unknown reason, to count the stars.
- The man's identity remains unknown.
- An unknown number of civilians were killed or injured in the attack.
- patients suffering from fevers of unknown origin
- unknown to somebody/something a species of insect hitherto unknown to science
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unknown unknown unknown
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