I think what part of Sustain Dialogue does and just being in community with people it also challenges you. -It does.

我觉得，“持续对话“所做的部分活动,和与你不同的人在一起交流,这很有挑战性，-的确。

普林斯顿公开课 - 人性课程节选

And that created enormous challenges, of our capability and systems and process to deal with this tremendous growth and expansion.

这也为我们带来了极大地挑战，公司的能力和机制与,快速的成长和扩张不符。

斯坦福公开课 - 戴尔CEO-Michael.Dell谈创业和发展课程节选

In these parts of the Politics Aristotle offers a serious challenge to existing Greek traditions and patterns of political education.

在这部份的《政治学》,亚里士多德对,当时的希腊政治教育传统与模式,提出严肃的挑战。

耶鲁公开课 - 政治哲学导论课程节选

I've tried to suggest through these stories and these arguments some sense of the risks and temptations, of the perils and the possibilities.

以上我是想向大家说明，这些故事和争论,展示的风险与诱惑，挑战与机遇。

耶鲁公开课 - 公正课程节选

Of course, the particular problem of Ireland, the challenge of Ireland as I suggested earlier, has an awful lot to do with that.

特别是爱尔兰的问题,我之前提到的,来自爱尔兰的挑战,也与之也有很大关系

耶鲁公开课 - 欧洲文明课程节选

The challenge is greater because in 2001 we had a fairly easy victory over the Taliban.

说挑战大,那是因为2001年在与塔利班的较量中，我们轻松地获胜。

普林斯顿公开课 - 国际座谈会课程节选

It never lost entirely its original character as an insurgent movement, independent of the state and hostile to it, making claims that challenge the secular authority.

它从来没有失去充满,反抗精神的本原色,它独立于国家并与之格格不入,公然向世俗权威发起挑战

耶鲁公开课 - 古希腊历史简介课程节选

What makes this enterprise difficult but also riveting is that moral and political philosophy is a story and you don't know where the story will lead.

这一过程会充满挑战又引人入胜,因为道德与政治哲学就好比一个故事,你不知道故事将会如何发展。

耶鲁公开课 - 公正课程节选