Immunity tests are carried out by varying the test severity level and the frequency of the induced disturbance.

免疫性试验通过改变试验的严格标准和感应干扰的频率得以完成。

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The director replied: "We have a very simple test to determine the severity level of the mental capacity of each patient."

主管回答说：“我们有一个很简单的测定法来判断病人精神病的深浅程度。”

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One of Grove's frustrations is the standard test neurologists use to measure a patient's level of severity of Parkinson's.

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