尽管年轻，他在辩论中展现了非凡的自信。

Despite his youth, he displayed remarkable ___self___assurance during the debate.

她在工作面试中展示了必要的自信和沉着。

She showed the necessary ___self___assurance and composure during the job interview.

他在众多听众面前表现出的自信和从容令人印象深刻。

His ___self___assurance and poise in front of the large audience was impressive.