这是一个极具挑战性的计划：当时只有少数几个州对基础课程有我所提出的这样的高要求。

It was an ambitious program: Only a handful of states then required as strong a core curriculum as the one I proposed.

youdao

我对选择工作是非常挑剔的，我不想随便找一个没有挑战性的工作，以此恭维应聘公司是一个有挑战性的地方。

I have been very selective in looking for the right job and I don 'want to settle for one in which I will find myself unchallenged.

youdao

但是就我过去的经验告诉我，的确，工作是需要有挑战性，但是有挑战性的工作是应该建立在那些对你来说简单的技能上的。

But what I've learned over the years is that, yes, work should be challenging, but you should base it around skills which are easy to you.

youdao

And for me it's fun because I may not know the novel that you end up picking, and so it is a kind of challenge for me to take a novel that you've chosen and come to grips with it myself It may be one that I know.

我也觉得很好玩,因为我可能不知道你们最后选择的小说，所以对我来说,认真对待你们选的一本书很有挑战性,可能是一本我知道的书。

耶鲁公开课 - 1945年后的美国小说课程节选