而且研究对象多集中在汉族地区和城市学校学生，研究工具也不够科学规范。
Furthermore, the object of study concentrated in the school students of the Han regions and cities and research tools is not enough scientific and standardized.
目的研究D2S1399和D5S2500基因座在中国华东地区汉族群体遗传多态性。
Objective To obtain the genetic polymorphism data of two STR loci D2S1399 and D5S2500 in Eastern Chinese Han population.
汉族地区在农业生产方面，依照二十四节令的规律安排生产，成为习惯。
Han areas in agricultural production, in accordance with the laws of 24 seasonal arrangements for production and become a habit.
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