There is substantial geographic variation in the rates of epidural steroid injections within the United States.
在联邦内硬膜外类固醇注射的使用率实际存在着地域性差异。
Small amounts of geographic variation have been demonstrated in several other traits, such as cortical concentration of certain monoterpene.
在其他几个性状上，亦经证明有少量地理变异，诸如皮部的某些单萜烯浓度。
The resin content in timber of Yunnan pine was mainly controled by hereditary substance, and also affected by the geographic variation of grow place.
云南松木材的松脂含量主要决定于遗传因素，但又受生长地理位置变异的影响。
Among the climatic factors which affect the geographic variation of tracheid morphological, moisture and rainfall are the principal factors, secondary is temperature.
影响管胞形态地理变异的气候因子中，水湿条件是主导因素，其次是温度。
Objective To understand geographic distribution of mumps virus genotypes and variation of circulating mumps virus strains in Beijing.
目的了解北京地区流行性腮腺炎病毒流行株基因型分布和变异情况。
Therefore, understanding the morphological and molecular variation of different geographic population of roe deer is important for us designing conservation strategies.
因此，深入了解目前狍各地理单元种群的分子变异，可以为我们制定保护策略提供重要的依据。
Due to spatial variation of selection regime, morphological, physiological and life history traits of widely-distributed species may vary genetically among geographic populations.
在自然选择压力空间变化的作用下，广布种的形态、生理和生活史特征往往在不同地区的种群间发生地理变异。
Research development of germplasm resources of Fructus Amomi was reviewed in the aspects of species resource, geographic distribution, intraspecies variation, and tissue culture.
从种类资源、产地分布、种内变异及组织培养等方面综述了砂仁种质资源的研究进展。
Molecular phylogenetic tree constructed by UPGMA and NJ method suggested that there were some genetic variation among different geographic population.
UPGMA和NJ法构建的种群间分子系统树基本一致，结果表明不同地理种群之间存在一定程度的遗传差异。
There are significant differences in growth in the young tree stage among different provenances of Sea Buckthorn and the differences are obvious with different geographic population variation.
试验表明，沙棘不同种源的营养生长和生殖生长以及果实生化成分都存在明显的差异。
There are significant differences in growth in the young tree stage among different provenances of Sea Buckthorn and the differences are obvious with different geographic population variation.
试验表明，沙棘不同种源的营养生长和生殖生长以及果实生化成分都存在明显的差异。
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