【正文快照】： 1基本概念1.1总体与样本观察单位(observed unit)是统计研究中的基本单位,一般指一个人,一只动物,也可以是指特定的一个家庭,一个自然村,还可以是一个器官。
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O observed unit 观察单位
The largest aftershocks of an earthquake over the years around the world we've observed tend to be about one magnitude unit less than the main shock, more likely within months, but it could be years.
我们所观测到的世界上地震发生后强度最大的余震通常要比主震小一级，一般是在几个月内发生，但也可能是在几年后。
The functional improvement rate of lung and extra-pulmonary organs, incidence of complication, mortality in intensive care unit (ICU) and causes of death were also observed.
观察两组患者肺及肺外器官功能改善率、并发症发生率、重症监护室(ICU)病死率及其死亡的原因等。
The collision of steel strip with flipper guide was observed on finish rolling unit.
现场观察发现了钢板撞击精轧机组侧导板现象。
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