behind closed doors

汉语翻译

例句：

1. The society held a series of meetings behind closed doors.
   这个团体举行了一系列的秘密会议。
2. Investigators will depose the witness behind closed doors.
   调查员们将让证人们在关闭的门后宣誓作证
3. The meeting was held behind closed doors.
   会议秘密进行。