中文翻译与英英解释

〔美国〕秘密渠道，非正规途径。

back:    n. 1.背，背部；背脊；背面，反面；背后，后部，后面， ...

channel:    n. 〔常 pl.〕【航海】突出舷侧承扣支索的铁板。

an alternative to the regular channels of communication that is used when agreements must be made secretly (especially in diplomacy or government); "they negotiated via a back channel"

例句与用法

Has made back channel overtures toward them to join their group
. . .主动通过秘密渠道向他们提出要他们入伙

Has made back channel overtures toward them to join their group
. . .主动通过秘密渠道向他们提出要他们入伙

He was a good and trusted back channel , and he kept his boss well informed
他是一个有用的而且可靠的小道消息来源，确保了他的上司消息灵通。

The single chip system is constructed which can control the double pendulum , including forward channel , back channel and communication with computer
这个单片机系统包括前项通道、后项通道、和上位机通讯三部分。