And then you'll find that your level of competency increases, your confidence level improves,

到时候你会发现你的能力提高了，信心增强了，

学第二外语的时候 - SpeakingMax英语口语达人

Why do you have confidence putting it in contact with one of the most important organs of your body?

为什么你对它有信心,让它接触,你身上最重要的器官

耶鲁公开课 - 生物医学工程探索课程节选

Because you'll have an appropriate level of confidence and competence in your ability to do computational problem solving.

因为你们在自己的能力范围内,拥有应对解决计算问题的,正当水平的自信心和竞争力。

麻省理工公开课 - 计算机科学及编程导论课程节选

Student: How did you regain confidence in your ? investors and people who gave money to you?

学生；，你是如何赢回,投资者或者投给你资金的人的信心的呢？

耶鲁公开课 - 金融市场课程节选

then I think absolutely plastic surgery can... maybe should be used if it's going to help with your self-confidence.

那么我觉得整形手术一定能……如果它能帮你增强自信，就应该整形。

关于整形手术 - SpeakingMax英语口语达人