我会一直记住布里塔尼，那个举止招摇而又张狂自负的女孩。而曾经腼腆而又不自信的我也会一如既往地保持那份谦卑。

I will always remember Brittany as that loud, overconfident girl, and a part of that shy, insecure person I used to be will always keep me humble.

youdao

在父母的鼓舞下，我找回了自信。

Under the inspiration of my parents, I regained my self-confidence.

youdao

重回大学增强了我的自信，使我更加了解自己。

Going back to college has increased my confidence and I feel much more self-aware.

《柯林斯英汉双解大词典》

But, just to be sure, not to be sure, but just to increase my confidence, I'm going to just run it again.

所以说它是对的是很有道理的，但是，确定一下，但是为了提高我们的自信，我要再运行一次。

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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

It's worth saying a word about that, because I want to undermine any great confidence that you may have and what you can believe that scholars tell you, because we keep finding out how wrong we are about all kinds of things.

这里得说的是,我想给自信满满的家伙泼点儿冷水,你曾深信不疑的学者们告诉你的那些事,不断被发现,并在很多问题上都存在纰漏

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