B. campestris content of leaf chlorophyll, leaf area index , leaf area-weight ratio were positive significantly correlated with the PR.
红菜苔叶片叶绿素含量、叶面积指数及比叶重与群体光合速率成正相关;
The design can realize the corresponding retrieval system, and the experiment also indicates that this system can improve recall ratio and pr...
设计实现了相应的检索系统,实验表明,该系统可以有效地提高检索的查全率与查准率。
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