backchanneled

In online classes, shy students sometimes backchannel to ask a question instead of speaking in front of everyone.

用法提示：backchannel 是动词原形，表示用非公开（后通道）渠道与人交流。

The crew were backchanneling through headsets during the live show to coordinate the camera shots.

用法提示：were backchanneling 是 backchannel 的过去进行时，表示在公开活动进行的同时通过旁路渠道私下沟通。

If you need to tell the host something private during a webinar, you can backchannel through the chat box.

用法提示：can backchannel 中的 backchannel 是动词原形，表示借助聊天框这类后通道进行非公开交流。