无明显损害作用水平no-observed-adverse-effect level(NOAEL)
据观察...it is observed that
甸个体数observed individual number
观测数据observations【统计】;observed data【统计】
观测值observed value, measured value; 又称“测定值”。
无毒性效应剂量non-observed effect dose, NOED
观察频数observed frequency
实际观测值actual observed value【统计】