形容词
中文翻译：难治的
同义词：
['intractable', 'stubborn', 'tenacious']
例句：
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1. The patient was refractory to the treatment.
病人对治疗有抗性。
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2. The scientist found it difficultto refractory his findings.
科学家发现很难接受他的结论。
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3. Thedisease is refractory to most treatments.
这种疾病对大多数治疗方法都无效。