Particularly last time tillage and plowed or not were significant elements that affecting the succession way in the locality(. 3)At early stage, the old-fields were often occupied by annual herbs.
最后一次耕种，特别指最后一次耕种的耕种面状况、有无翻耕是影响当地弃耕地植被演替路径的两个重要因素。（3）弃耕早期阶段弃耕地往往会被周边某种离它较近的一年生草本所占据。
The units that have overfulfilled the annual blood-donation plan for three years in succession;
连续三次超额完成年度献血计划的单位；
The units that have overfulfilled the annual blood-donation plan for three years in succession;
连续三次超额完成年度献血计划的单位；
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