The study has been based on both the model for rice population growth and the model for simulating population life system of lice case worm.
本研究是在水稻群体生长模型和纵卷叶螟种群生命系统模拟模型的基础上进行的。
According to level of redundancy that exists in life system, redundancy can be divided into individuals, population and community.
根据其影响的水平，冗余可发生在个体、种群及群落等水平上。
As the edge population, the peasant labors are not only rejected by the urban social security system, but also different from the peasant in the traditional sense. Their life state makes people worry.
作为边缘人口的农民工，他们既被城镇社会保障体系所排斥，又与传统意义上的农民存在着隔阂，其生活状况令人担忧。
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