Negative Control is a specimen that gives no reaction under the conditions of the test.
阴性对照是指在试验条件下无任何反应的试样。
Divided randomly into test group, negative control group, and treatment group, 10 persons per group.
随机分为试验组、阴性对照组和治疗组，每组10例。
Divided randomly into test group, negative control group, and treatment group, 10 persons per group.
随机分为试验组、阴性对照组和治疗组，每组10例。
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