名词
中文翻译：结核分枝杆菌
同义词：
['PPD test', 'tuberculin skin test']
例句：
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1. The patient's PPD test result was positive, indicating a previous infection with tuberculosis.
患者的PPD试验结果呈阳性，表明患者曾感染过结核病。
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2. The doctor recommended the patient to undergo a PPD test before starting treatment.
医生建议患者在开始治疗前进行PPD试验。
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3. The PPD test is an important tool for diagnosing tuberculosis.
PPD试验是诊断结核病的重要工具。