22 篇文章
...is a constant challenge.
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...is a constant challenge. 是一项持续的挑战

the mammals were faced with a new challenge.
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the mammals were faced with a new challenge. 哺乳动物面临一个新的挑战

But the Himalayas present the ultimate hunting challenge.
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But the Himalayas present the ultimate hunting challenge. 但喜马拉雅山脉给出了终极捕猎挑战

something that would challenge mammals as never before.
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something that would challenge mammals as never before. 这将对哺乳动物提出前所未有的挑战

couldn't overcome the planet's next great challenge.
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couldn't overcome the planet's next great challenge. 也无法克服 地球面临的下一个严峻挑战

The challenge is catching them.
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The challenge is catching them. 难点在于如何捕捉

will be her greatest challenge.
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will be her greatest challenge. 就没那么容易了

one curious life-form was among the first to rise to the challenge.
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one curious life-form was among the first to rise to the challenge. 有一种好奇的生物率先发出挑战

to challenge the alpha.
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to challenge the alpha. 挑战雄性领袖

If you're not ready to challenge her,
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If you're not ready to challenge her, 要是你没作好挑战她的准备