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!

我们得向大自然挑战！

One challenge for the service consumer is to find the correct operations.

服务使用者所面临的一个挑战就是找到正确的操作。

We'd probably fall back and describe a past work challenge that we may or may not be exaggerating.
(www.Ws46.com)

或许我们会回顾一下过去工作中碰到的挑战，而且不带一点夸张的把它描述出来。

The challenge is to turn those fragile and unfulfilled global commitments into real solutions.

这项挑战将把那些空洞无力的、为实现的全球性承诺化为真正的行动。

He received a challenge to a TV debate.

他接到电视辩论的挑战。

The real challenge will be to prevent water conflicts from spilling across borders.

防止水冲突蔓延出国界，是一项极其艰巨的任务。