Racing teaches us to challenge ourselves.

比赛教我们挑战自我。

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We have to challenge ourselves to be better.

所以我们必须挑战自我，做得更好。

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If we never challenge ourselves, we will begin to doubt our abilities.

如果我们不挑战自我，我们就会开始怀疑自己的能力。

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And we challenge ourselves to do the system design so that we responsibly took into account all of the dimensions that we talked about at the beginning.

我们通过做这个,制度设计挑战自我,以便于充分考虑,我们最初谈到的,所有方面。

麻省理工公开课 - 媒体、教育、市场课程节选

And the challenge that we gave to ourselves is can we do that packaging in such a way that lays a ground work for community learning coming out of people who got involved in looking at the experiment of knowledge updates.

我们自己面临的挑战是,究竟能否,借用技术打包,为知识更新实验的,观看者的群体学习打下,坚实的基础。

麻省理工公开课 - 媒体、教育、市场课程节选

"We have to challenge ourselves and debate these issues, but it's clear some people don't want that, " she says.

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And we challenge ourselves as leaders to bring our people with us to broaden support for the work of APEC.

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We challenge ourselves to keep up, even hasten the grueling pace, and frankly, we rationalize that it comes with the territory.

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