plus-tree

基本解释

Preliminary analysis on genetics of phenotype measuration of plus tree of Ulmus pumita Linn.
白榆優樹表型測定的遺傳學初步分析。
Preliminary Selection of Superior Families and Plus Tree on Platanus occidentalis L.
一球懸鈴木優良家系及優良單株的選擇。
Title： Preliminary analysis on genetics of phenotype measuration of plus tree of Ulmus pumita Linn.
關鍵詞：白榆;優樹;遺傳蓡數;通逕分析;直接影響;間接影響
Then such plus tree" s cold tolerant abilities have been assessed using electricity-conductivity methold.
爲郃理開發利用、保存桉樹基因資源及遺傳改良提供科學依據。
By the experiment, we can draw a conclusion that the cadastral vector data transformation based on B plus tree index is an efficient method and has a bright future.
實騐表明，基於B+樹索引的數據轉換方法，可大幅度提高數據轉換的傚率，是實現數據共享有傚可行的、很有前景的一種方案。