MTT colorimetric assay revealed experimental groups elevated OD value compared with control groups(P< 0.05).
药物组OD值明显高于对照组（P<0.05），而且有一定的血清浓度依赖性。
To strengthen the school roll management in new Peri od, the new value of its characteristics must be understood correctly.
加强新时期高校学籍档案管理，必须正确认识它新的价值特点。
The purpose of OD investigations is to make statistical estimation of the average value of the samples based on the OD data obtained.
OD调查的目的是利用调查所得的OD数据对样本总体的均值作出统计推断。
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