对于如此年轻的演讲者来说，他以极大的自信向观众发表了讲话。

For such a young speaker, he addressed the audience with great ___self ___assurance.

在工作面试中，展现出自信和能力至关重要。

In a job interview, it's crucial to project ___self ___assurance and competence.

她在处理危机时表现出的冷静自信激发了整个团队的信心。

Her calm ___self ___assurance in handling the crisis inspired confidence in the entire team.