侃侃而谈 (kǎn kǎn ér tán): พูดอย่างตรงไปตรงมาด้วยความมั่นใจ

During the interview, he spoke confidently and fluently to the several examiners, explaining his project experience very clearly.

At the international conference, that scientist spoke confidently and fluently, introducing her latest research findings in fluent English.

At the graduation ceremony, as the student representative, he spoke confidently and fluently, sharing his growth and reflections from four years of university.

When talking about his beloved football, he, who is usually quiet and taciturn, surprisingly spoke confidently and fluently, from tactics to star players, unable to stop.

Although it was her first time participating in a debate competition, she still spoke confidently and fluently, refuting the opponent's views with strong evidence.