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talk (esp. by a talk-show host, or by a stage musician to the audience between songs); banter; chat
talk show
司会者のトークが会場を盛り上げた。
The host's banter got the venue excited.
彼女のトークは面白くて笑いが絶えない。
Her chat is so entertaining that there is constant laughter.
本番前にゲストとのトークコーナーで緊張をほぐした。
Loosened up with the talk segment with guests before the show.