Migrating animals maintain an intense attentiveness to the greater mission, which keeps them undistracted by temptations and undeterred by challenges that would turn other animals aside.

迁徙动物对于更宏大的使命保持着高度专注，这一使命让它们不会被诱惑分散注意力，也不会被挑战吓倒，这些挑战可能会让其他动物转变方向。

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But the company has also been dogged by challenges here, though Apple does not typically disclose its list of suppliers.

但在这里公司也遭到紧随而来的挑战，尽管苹果通常并不公布供应商的名单。

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Some students cope with this shock by avoiding challenges.

一些学生通过逃避挑战来应对这种冲击。

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"Some of our projects have looked at what we call situational impairments, which are challenges to accessibility that are caused more by the situation or context that the computer user is in instead of maybe as we usually think of accessibility as having to do with someone's own physical or cognitive state."

VOA: special.2011.04.18

And so by listening and encouraging, I help students see that there's a way to resolve any challenges that they might face.

如此，通过倾听和鼓励，我让学生们看到他们有办法,去应对面临的一切挑战。

普林斯顿公开课 - 人性课程节选

Problem Set One will be posted on the course's website tonight by 7:00 p.m. It will very clearly walk you through the week's challenges.

习题集1今晚7：00，将在课程的网站上贴出来,它将非常清晰地带领你们,通过这个星期的挑战。

哈佛公开课 - 计算机科学课程节选

If his standing remains unshakeable within his caucus, DeLay seems beset by challenges from several directions at once.

NPR: Washington Eyes DeLay PAC Trial in Texas

More broadly, the church is buffeted by challenges including the rise of Islam and the emptying of pews in Europe.

WSJ: Argentina's Cardinal Bergoglio Elected Pope

Judging by challenges at HP, Microsoft and Cisco: each is being challenged by at least one of the four forces.

FORBES: Gartner: More iPads Than Blackberries In Business In 2 Yrs