He appeared relaxed and confident before the match.

比赛前，他显得镇定而自信。

《牛津词典》

You have to be strong and confident, and never give the slightest impression that you can't hack it.

你必须坚强和自信，决不要给人留下丝毫应付不了此事的印象。

《柯林斯英汉双解大词典》

Close your eyes and remember a special time you felt really relaxed and confident.

闭上眼睛，回忆一下你感到非常放松和自信的特别时刻。

youdao

And that's half the battle with education. Give them control, make them feel confident and enjoy their learning and you'll see them start to improve and embrace it."

VOA: special.2011.04.21

It's in this period that Milton increasingly begins to adopt, or assume, Saint Peter's confident and denunciatory rhetoric.

就是在这段时间弥尔顿越来越接受，去采用，圣彼得的有信心的责难似的语言。

耶鲁公开课 - 弥尔顿课程节选

So my walk is, it's not confident and I'm not sure if I'm strong in my step yet.

所以我的走姿不是特别自信，担心步伐会不稳。

I wonder if 实战 - SpeakingMax英语口语达人

But yesterday, the former president said he's ready to campaign for Obama and confident in the nominee.

NPR: Obama, McCain Speak At Community Service Forum

Plus, sharing the responsibilities will help you create a more productive, competent, and confident team.

FORBES: 6 Tips for Delegating Success

There was a meeting on Monday, but are you satisfied and confident on the process?

WHITEHOUSE: Press Briefing