behind closed doors

adv. 与外界隔绝地(秘密地)

例句与用法：

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。

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。

The meeting was held behind closed doors.

会议秘密进行。

词形变化：

动词过去式: beheaded | 动词过去分词: beheaded | 动词现在分词: beheading | 动词第三人称单数: beheads |

详细释义：

秘密的(地)

It was a bitter debate behind closed doors.

那是场秘密的激烈辩论。