通过向机器提供某个病人的症状，医生就能诊断病人疾病的性质。
By providing a machine with a patient's symptoms, a doctor will be able to diagnose the nature of his illness.
人体指纹谱可以诊断某些疾病的性质和轻重程度，是一种方便的无损检测手段。
The somatic fingerprint spectrum can diagnose the properties and degree of some illness, which is a unbroken-test method.
那时对健康和疾病的性质，以及对如何进行实验把原因和结果从巧合中分离出来，都知之甚少。
Very little was known about the nature of health and disease or about how to conduct experiments that separate cause and effect from coincidence.
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