challenge的动词

challenge本身就是动词，向……挑战，动词过去式：challenged，过去分词：challenged，过去分词：challenged，现在分词:challenging，现在分词：challenging，第三人称单数：challeng。

If your use case model is exploding, challenge the granularity of your use cases.

如果你的用例模型正在 增长，你应该挑战你的用例粒度。

Bribery is a global challenge in the international societies

摘要商业贿赂是国际社会面临的急需解决的全球性问题。

They're the biggest challenge of the day globally and the whole end game.

他们的问题是现今全球范围内最大也是最终的挑战。

Though I ams junior student now, I have never tried to challenge myself on a publich stage.

我已经是一名大三的学生，之前却一直没有机会在一个大舞台上来考验一下自己。

We ought to challenge Mother Nature!