challenge的形容词：challenging；
例句：
It was challenging, but she also made it fun.
这很有挑战性，但她也让它变得很有趣。
Giving a speech in front of your class can be challenging.
在你的班级面前演讲是具有挑战性的。
扩展资料
It is not just readers who are challenging the media elite.
挑战媒体精英的不仅仅是读者。
Once upon a time the physical book was a challenging thing.
从前，实体书是一件具有挑战性的`东西。
Killy began challenging the basic theories of racing technique.
基利开始挑战赛车技术的基本理论。
