Unsuitable model, method or technical measures of land arrangement will bring the negative impact to the eco-environment of the farmland, that result in the decline of the environment quality.
不适当的土地整理方式、方法和技术措施，会对农田生态环境产生负面影响，导致环境质量下降。
Introduced characters and operation process of extensive method, made a scientific try on arrangement of college sports sample curriculum by gave a feasible model of matter-element on it.
介绍了物元方法的特点及操作步骤，并给出了高校公共体育选修课编排的物元模型，对公共体育选修课编排科学化作了尝试。
A mathematical model of the competitive procedure arrangement is designed in this article by using the edge coloring method of graph theory.
利用图论的边着色理论建立了一个赛程安排的数学模型。
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