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English word
challenging
B2Frequent NGSL-1difficult in an interesting way that tests your ability
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a sometimes cruel and challenging world.
J.K. Rowling Harvard Commencement Speech
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Bilingual subtitles · repeat a sentence · shadowing · word bank
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I started studying kids and adults in all kinds of super challenging settings, and in every study my question was, who is successful here and why?
What is the most challenging part of making an album like this?
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