I can declare in no uncertain terms that not praising children can lead to their lack of confidence.

我可以毫不含糊地说，不赞扬孩子会导致他们缺乏自信。

youdao

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

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。

youdao

I think a lack of confidence underlies his manner.

我认为他表现出的态度是因为他缺乏信心。

youdao

The big set back I see is the lack of confidence that girls have.

FORBES: The Two Most Important Words For Young Girls: Engineering And Technology

Yet there is a crisis of confidence, an uncertainty and a lack of optimism in our society which I believe should trouble us.

CENTERFORSECURITYPOLICY: From fashion to fortitude: the road to resilience

But - as I described in my last post - the lack of market confidence has a real cause.

BBC: Bank worries bring echoes of 2008