1. We wandered through subterranean passages. �������ε���ͨ����
2. Zazz grasps a target with its multiple subterranean tentacles. ��˹������ֻ���´�����ץסĿ�ꡣ
3. Mithraea were dark and windowless, even if they were not actually in a subterranean space or in a natural cave. ̫����Ѩ�Ǻڰ������ģ���ʹ���Dz������������ĵ��¿յػ�����Ȼ��Ѩ���档
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adj.
1. being or operating under the surface of the earth
2. lying beyond what is openly revealed or avowed (especially being kept in the background or deliberat