副词
中文翻译：难以解决地
同义词：
['stubbornly', 'obstinately']
例句：
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1.The problem was intractable and could not be solved easily.
这个问题难以解决，不容易解决。
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2.He is intractable and will not listen to reason.
他固执己见，不听劝告。
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3. The task was intractable and required a lot of effort to complete.
这项任务难以完成，需要付出很多努力。