Building a home from scratch can be both exciting and challenging.

白手起家既激动人心又具有挑战性。

《柯林斯英汉双解大词典》

This is a book full of profound, original, and challenging insights.

这是一本充满高深、新颖且富有挑战性见解的书。

《柯林斯英汉双解大词典》

It's more likely that none of us start a conversation because it's awkward and challenging.

更有可能的情况是，我们当没人开始说话，因为既尴尬又具有挑战性。

youdao

In a brief statement from the White House, Mr.Obama stressed this will be a complex and challenging operation.

VOA: standard.2010.01.13

But it was very interesting and challenging.

但我觉得很有意思，很有挑战性。

第二外语，英语 - SpeakingMax英语口语达人

I think this is as good list so let's go and think about what might be a little bit more challenging.

我想上面这些都是很好的例子,接下来我们思考一些更有挑战的问题

耶鲁公开课 - 生物医学工程探索课程节选

The Carretera Austral could be one of the most spectacular and challenging cycle tours in the world.

BBC: Chile��s land of ice-blue lakes

"This has been a difficult and challenging few days, " said U.S. military spokesman Maj.

NPR: Clashes with Militants Test Iraqi Security Forces

But, of course, this region has always been pristine frontier, rugged and challenging.

FORBES: Canada's Magnificent And Priceless Water Supply