undisclosed
adjective uk/ˌʌn.dɪsˈkləʊzd/ us/ˌʌn.dɪsˈkloʊzd/
未披露的,未公开的,保密的
If official information is undisclosed, it is secret.
The meeting is taking place at an undisclosed location. 会议在一个秘密地点召开。
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