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aizuchi; backchanneling; interjections indicating that one is paying attention
two smiths hammering at an object in turn
相槌を打ちながら話を聞く。
I listen while giving backchanneling cues.
適度な相槌は会話を円滑にする。
Moderate backchanneling makes conversations smoother.
彼女は相槌の打ち方がとても自然で感心した。
I was impressed by how naturally she gives backchanneling cues.