challenging /ˈtʃælənʤɪŋ/ adjective Learner's definition of CHALLENGING
[more challenging; most challenging]
: difficult in a way that is usually interesting or enjoyable挑战性的；引起兴趣的 -
I find the job challenging and fun.我觉得这工作既有挑战性又有乐趣。
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Teaching is challenging but rewarding work.教书是既有挑战性又有意义的工作。
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It's a challenging book that requires careful reading.这是一部令人深思的书，需要认真阅读。
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The slope was challenging for even the most experienced climbers.即使对于最具经验的攀爬者，这个陡坡也有很大难度。