And yes, it's as challenging a task as it sounds.

没错，这一点听上去是一个挑战性的任务。

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Building a home from scratch can be both exciting and challenging.

白手起家既激动人心又具有挑战性。

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The programme aims to educate and prepare students for a challenging career.

这个项目旨在教育学生使其为一个具有挑战性的职业做好准备。

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"It is extraordinarily challenging and that is why Calderon is fighting a war on multiple fronts,"

VOA: standard.2009.12.18

Is anyone else pre-med here? Okay, so a pretty good showing. So maybe you can relate to some of the reasons I wanted to be pretty pre-med -- part of it was the interest in the science and the biology. Also, I wanted to help people -- it seemed like a really clear way that I could have a career that was challenging and involved in science, but also helping others.

你们中有医学预科的吗？,不错，有不少人,也许你们出于和我当年,想读医学预科一样的原因,一方面是受灾科学和生物学方面兴趣的驱使,另一方面,我想帮助别人,所以我似乎应该选择。

麻省理工公开课 - 化学原理课程节选

so it's a very challenging and a place to grow.

所以这很有挑战，也是让人成长的地方。

喜欢加州 - SpeakingMax英语口语达人

This is a bit like not challenging a pickpocket because the poor fellow might get huffy.

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Dan Seals and Debbie Halvorson, and Bill Foster, who is challenging a Republican lawmaker.

CNN: STORY HIGHLIGHTS

By threatening this arrangement Veeck is challenging a basic feature of the modern regulatory state.

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