事实上，我是渴望成功的，但是我缺乏信心。

Actually, in my heart, I want to be successful, but I am lack of self - confidence.

youdao

我穿着高跟鞋来弥补我的身高，采用心理策略和技巧来掩盖自己信心的缺乏。

I used bigger heels to complement my height and psychological maneuvers and tricks to hide my lack of confidence.

youdao

我认为他表现出的态度是因为他缺乏信心。

I think a lack of confidence underlies his manner.

youdao