Although it is challenging to work in Antarctica, scientists' passion to learn about this mysterious land will never end.

虽然在南极洲工作极具挑战性，但科学家们对这片神秘土地的热情永不停歇。

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Just as it's challenging to smoke while knitting, when hands are holding needles and hooks, there's less snacking and mindless eating out of boredom.

就和编织与吸烟同时进行具有挑战性一样，当手里拿着针和钩子的时候，就能减少出于无聊而吃零食和盲目进食的可能。

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As a leader, it can be challenging to create an environment in which people will freely disagree and argue, but as the saying goes: From confrontation comes brilliance.

对于一个领导者而言，创造一个让人们可以自由表达异议和主张的环境是很有挑战性的，但正如俗话所说——冲突之下，必有精彩。

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"And the brain is activated by this challenging environment and signals to the fat to stop the release of this hormone.

VOA: standard.2010.07.14

And I'd like to leave you with a challenging question.

下面我想留给你们,一个具有挑战性的问题。

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you are challenging the other person to consider the alternatives.

你就在挑战另外一个人考虑别的选择。

What if 课堂 - SpeakingMax英语口语达人

It's very, very challenging to come to the Olympic stage and give your best performance.

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They're way more athletic, and that makes them a little more challenging to defend sometimes.

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The last detail I tested was the most challenging to get accustomed to: voicemail.

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