名词
中文翻译：Unknown
同义词：
['spot test', 'stain test', 'bloodstain test']
例句：
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1. Blood spot tests are used to detect the presence of drugs in a sample.
血液斑点测试用于检测样本中的药物存在。
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2. During the spot test, the sample is placed on a filter paper and left to dry.
在斑点测试中，将样本放在滤纸上并让其干燥。
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3. The doctor performed a spot test on her urine sample to check for any traces of medication.
医生对她的尿液样本进行了斑点测试，以检查是否有任何药物痕迹。