优良玉米自交系自330、E28和丹340等为代表的丹玉自交系，是中国玉米育种和生产中最重要的骨干材料。
The superior maize self-bred lines of Danyu series such as Zi330, E28 and Dan340, etc, are the most important key materials for the maize breeding and production in China.
丹玉39号虽然产量也较高，但含水率太高，出现“水玉米”现象，遇到低温年份有不能正常成熟的可能，不适宜在佳木斯种植。
Danyu no. 39 had high moisture content which was impossible ripe if it met low temperature years, so it was not suitable to plant in Jiamusi region.
目的探讨玉丹荣心颗粒对小鼠非特异性免疫和特异性免疫的调节作用。
Objective it is to approach the accommodation effect of Yudan Rongxin granula on nonspecific and specific immunity in mice.
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