先前的一些研究表明，参与心理刺激的活动来挑战你的大脑可能会有所帮助。

Some previous studies have suggested that challenging your brain with mentally stimulating activities might help.

youdao

挑战你的思想和身体。

Challenge your mind and body.

youdao

展现出这个困难挑战你能应付处理。

Presented as a challenge that you have the skills to handle.

youdao

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 so if you choose to elect the hacker edition of this week's problem set the challenge will be to figure out not only how to implement the game but how to implement a solver for the game.

因此，如果你选择这周的应用题目为升级版,那么你将面临的挑战,不仅是如何实现这个游戏，而且,要实现此游戏的解决方法。

哈佛公开课 - 计算机科学课程节选

So the challenge thing comes back to the instruction of designer: what are you for on this access?

这样，教育设计者,又重新面临着挑战：,你会支持这项技术吗？

麻省理工公开课 - 媒体、教育、市场课程节选