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arduous
'ɑ:djuәs
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TOEFL
IELTS
柯林斯1⭐
释义
a. 费力的, 努力的, 险峻的
英文释义
s. characterized by effort to the point of exhaustion; especially physical effort
s. taxing to the utmost; testing powers of endurance
s. difficult to accomplish; demanding considerable mental effort and skill
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当代语料库词频排名:
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