Destruction of the environment is one of the most serious challenges we face.

环境的破坏是我们所面临的最严峻的挑战之一。

《牛津词典》

A report from IPCC, the UN's climate science body, showed that if global temperatures rise more than 1.5℃ by the end of the century, poor countries will likely face very serious challenges, including the disappearance of whole communities and millions of early deaths.

联合国政府间气候变化专门委员会的一份报告显示，如果到本世纪末全球气温上升超过1.5℃，贫穷国家将可能面临非常严峻的挑战，包括整个社区的消失和数百万人的过早死亡。

youdao

The rapid pace of modern software development has created some serious challenges for development teams.

现代软件开发的高速度为开发团队造成了一些严峻的挑战。

youdao

Saying serious challenges remain, the risks to recovery from fiscal adjustment across several major economies.

VOA: standard.2010.06.27

"Today I say to you that the challenges we face are real, they are serious and they are many.

VOA: special.2010.01.23

On the the 40th anniversary of Earth Day, this warming planet we live on is posing serious new challenges to human civilization: increasingly severe droughts, floods,and storms across the globe, and slowly rising ocean levels.

VOA: standard.2010.04.21

Despite persistently high unemployment, many CIOs cite talent shortages as one of their most serious challenges.

FORBES: The IT Skills Gap

So this victory does not erase the many serious challenges we face as a nation.

WHITEHOUSE: The Promise of Health Care Reform

There are serious challenges to being the first luxury property in a developing country.

WSJ: The Challenge of Pitching Nicaragua as the Next Paradise