concentration of population的意思|示意

With the rapid expansion of city scale and the excessive concentration of population, the sound urban disaster prevention system has become a necessary arduous task.

随着城市规模的急速扩大和人口的过度集中，健全城市防灾系统已成为一项不容忽视的艰巨任务。

The time of dynamic nitrogen adjustment were determined by regular patterns or by the comprehensive evaluation of soil mineral nitrogen concentration and rice population status.

氮素动态调控时期由高产栽培常用的追肥时期或根据水稻群体状况与土壤矿质态氮浓度综合判断确定，追氮量由模型计算获得。

Regarding the urbanization, I think it is a historical progress featuring of the concentration of population , efficiency , mutual interaction between city and rural area.

对于城市化的理解，笔者认为城市化是一个历史的过程，是以人口的集中为重点的资源集聚过程，是追求效益集约的过程，是城乡互动的过程。

With the rapid expansion of city size and population concentration, improving the urban disaster prevention system has become a daunting task can not be ignored.

健全城市防灾系统成为一项不容忽视的艰巨任务，这是由城市规模的急速扩大和人口的过度集中所造成的。

Having brownish acidic waters, a high concentration of humic matter, and a small plant population. Used of a lake or pond.

无滋养的带有棕色酸性物质的水域，腐殖物高度集中并有小型植物群的。用来描述湖泊或池塘收藏。

It's suggested that iodine nutrition surveillance of pregnant and breast feeding women should be strengthen, adjusting the concentration standard of salt iodine for all target population.

建议今后要加强孕妇和哺乳妇女的碘营养监测，并以其作为目标人群来调整食盐加碘浓度。