形容词
中文翻译：难以解决的
同义词：
['insoluble', 'insuperable', 'insurmountable']
例句：
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1. The problem of climate change is an intractable one that requires immediate action.
气候变化问题是一个棘手的问题，需要立即采取行动。
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2. The scientist found the solution to the intractable problem with great difficulty.
这位科学家在解决这个棘手的问题时遇到了极大的困难。
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3. The intractable nature of the disease made it difficult for the doctors to treat.
这种疾病的棘手性质使得医生很难治疗。