Don't risk injury or death because of over-confidence or lack of knowledge.

不要因为过于自信或缺乏知识而冒受伤或死亡的风险。

youdao

Perhaps that led to this over-confidence and jackassery.

也许这导致了这种过度自信和麻烦。

youdao

The question is when this strays into over-confidence.

问题是这何时变成了过分自信。

youdao

In a first reaction the EU's executive branch, the European Commission, said it was confident the Czech Republic could continue to "effectively preside over the European Union" despite the government losing a no-confidence vote in Prague Tuesday's vote of no confidence came after the opposition said the government came to late with a stimulus package of over three billion dollars to boost the ailing economy of this Eastern European nation.

VOA: standard.2009.03.25

But they--because of over confidence and magical thinking, it starts to go to their ego.

但由于过度自信和神奇式思考,他们会自我膨胀

耶鲁公开课 - 金融市场课程节选

But it is still not a time for over-confidence, or to adopt a buy and hold approach.

FORBES: Fiscal Cliff Could Be One Mean Grinch For Stocks

But dictatorships can make a mess of things, too, if dictatorial over-confidence leads them to ignore hard facts.

ECONOMIST: THE NEXT BALANCE OF POWER

But that period of careless talk and occasional over-confidence did lasting reputational damage.

BBC: Flooding in York