"It is for the BBC, knowing that the party was allowed to stand in the European elections and other elections, then to judge their level of support, to then say, it is therefore fair for them to have a place on Question Time to be challenged along side other political parties as well.

VOA: standard.2009.10.23

To so many readers it has seemed that Eve is actually quoting Milton's much earlier writing, Areopagitica, in her defense, and it has an incredibly unsettling effect. Evil has to be challenged.

对于很多读者，这似乎是夏娃引用弥尔顿,早期的作品《论出版自由》为自己辩护，这又造成了极大的混乱的影响，恶在这里被挑战了。

耶鲁公开课 - 弥尔顿课程节选

It can be challenged on normal... Yeah, open to challenge. -Right.

一般情况下人们可以挑战。,对，人们可以挑战其中的观点，-是的。

普林斯顿公开课 - 人性课程节选

These results are surprising and disturbing and I said there is work to be done at an individual and group level and this young man challenged me to be more explicit about that.

这些结果都出乎意料，而且让人不安,我说过个人和群体都要下功夫,这位同学要我明确地说怎样下功夫。

耶鲁公开课 - 心理学导论课程节选