It is an estimate of the mean of the population.
这是对人口平均数的一个估计。
As delay time increases, the mean extinction time of a meta population decreases.
随延迟时间增大，集合种群得灭绝时间将会减小。
The mean of a normally distributed population lies at the center of its normal curve.
正态分布总体的平均数在正态曲线的中心。
In a simple random sampling, the sample mean is an unbiased estimate of the population mean.
在简单随机抽样中, 样本均值是总体均值的无偏估计。
In many matequality recognition systems, females prefer signals that deviate most from the population mean.
对雌性有吸引力的特徵，会有夸大的演化现象。
Any breakdown in the food distribution system could mean the majority of the population will suffer shortages of basic food supplies.
食品分发系统的崩溃可能意味着，大多数人口将会遭受基本食物短缺的痛苦。
When we say it is a major country, we mean it has a huge population and a vast territory, although it has more mountains than arable land.
大是地多人多，地多还不如说是山多，可耕地面积并不多。
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