Confident in its camouflage, being the same colour as the rocks, the lizard stands still when it feels danger.

蜥蜴对自己和石头颜色相同的保护色很自信，即便感觉危险也不动。

《柯林斯英汉双解大词典》

Employees become more confident in their work.

员工在工作中变得更加自信。

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He says "I don't have much tournament experience but I'm confident in my game."

VOA: special.2010.07.26

We don't expect everybody to be a course six major, contrary to popular opinion, so for those are you not in that category, the second thing we want to do is we want to help students who don't plan to major in course six to feel justifiably confident in their ability to write and read small pieces of code.

和大众意见正相反，我们不希望所有人都变成course，six的主修学生，所以对于那些不在第一梯队里的人来说，我们想做的第二件事情就是,希望帮助还不想,主修这门课的人,都能获得在自己能力范围内,读写小编码的自信。

麻省理工公开课 - 计算机科学及编程导论课程节选

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

"We're very confident in the safety and efficacy of Arcoxia, " says Merck spokeswoman Christine Fanelle.

FORBES: Magazine Article

"It is a difficult market out there but we are confident in the future, " he said.

BBC: Border Precision Engineering owners voice job optimism