您要查找的是不是：
- arithmetric mean of population 总体算术均数
- The numbers of population of Chironmidae varied with two peaks in annual fluctuation.The hatch abilities of Chironomidae were 28.97-47.57% in cohirt, with a mean of 41.6 percent. 摇蚊科幼虫的区系季节变化，一年中有两个高峰期，其羽化率为现存量的28.;97%25至47
- The density of population in this city is very high. 这个城市的人口密度非常高。
- It is an estimate of the mean of the population. 这是对人口平均数的一个估计。
- Nonparametric estimator for mean of population 总体均值的非参数估计
- He let himself down slowly by means of a tope. 他借助一根绳子慢慢地下来了。
- Demography is the analysis of population variables. 人口学是对人口变量的分析。
- It was very mean of you not to let the children play in the snow. 你不让孩子们在雪地里玩，真是管得太紧了。
- We now come to the question of population. 现在我们开始谈人口问题。
- We talked for hours about the meaning of life. 我们谈人生的意义谈了几个小时。
- Do you know the density of population in this area? 你知道这个地区的人口密度吗?
- The train is a safe means of transportation. 火车是一种安全可靠的交通工具。
- No,actually,it's more a matter of population. 不，实际上这更是一个人口问题。
- Automation by means of computers. 借助计算机而实现自动化。
- They succeeded by means of hard working. 他们依靠努力工作而获得成功。
- Description for type of population. 对填充类型的说明。
- He succeeded by means of perseverance. 他是通过坚持成功的。
- Please find alternative means of transport. 请另外找一个运输方法。
- Censuses of population and statistical yearbooks. 人口普查与统计年报。
- In this paper, based on the Morris-watt population mathematical model, and by means of exclusion analysis, addition analysis and interference analysis methods, an index of population control was designed. 在种群系统的信息处理中,本文着重讨论控制指数在种群系统控制中的应用。 控制指数是以系统方法改进昆虫种群生命表和Morris-Watt种群数学模型的基础上,采用排除分析法、添加分析法和干扰分析法提出的一个指数。
