in camera
adverb law specialized uk/ˌɪn ˈkæm.rə/ us/ˌɪn ˈkæm.rə/
私下的，秘密的，不公开的
in private, without the public, newspaper reporters, etc. being there
The trial was held in camera because the accused was only 14 years old. 审判没有公开进行，因为被告是个只有十四岁的孩子。