形容词
中文翻译：Unknown
同义词：
['enduring', 'tenacious', 'persistent']
例句：
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1. The patient's condition was persistent despite the treatment.
尽管治疗，病人的状况还是持续。
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2. The persistent rain caused the roads to become muddy.
持续的雨水使道路变得泥泞。
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3. The persistent questioning of witnesses led to a break in the case.
对证人的持续盘问导致案件中断。