variation n. 1.变化,变动。 2.变量,变度,偏差。 3.【语言】语尾变化;变体,异体;【数学】变分,协变;顺列;【生物学】变异,演变,变种;【音乐】变奏曲;【天文学】变差;(月的)二均差;【物理学】磁差。 a principle without variation 不变的方针[原则]。 be capable of variation 可能变化。 be liable to variation 容易变化。 These prices are subject to variation. 上列价格可能变更。 adj. -al
The pca results indicated that the characteristics of length , breadth , the angle of leaf basal in lamina and the characteristics of calyx - tube , corolla dimension and inflorescence pedicel in the flower were the main reasons leading to the morphological variations , and the f - test of single factor variance analysis verified the conclusion 主成分分析显示,叶部特征的长度、宽度、叶基夹角等,以及花部特征的花兽筒、花冠幅、花序总梗等是造成不同居群野生早樱表型差异的主要因素,单因素方差分析也印证了这一结论。
Considering the deterioration series of populations , deterioration degrees led to morphological variations . with the increasing of grassland deterioration , vegetative tiller length and reproductive tiller length became shorter . medium sized bunch , small sized bunch , reproductive tiller percentage , reproductive tiller number were reduced 退化系列种群的形态变异随退化程度而异,营养枝和生殖枝长度随着退化的加重枝条长度变短,中、小株丛减少,生殖分配减少,生殖枝数量减少。
This study is a post - cruise study of this leg , calcareous nannofossil samples from sites 1146 , 1147 and 1148 of leg 184 were analyzed to provide a high - resolution biostratigraphy for this leg and to investigate morphological variation of coccolith genus gephyrocapsa . the main results of this study are : 1 . 12 late pliocene to pleistocene bio - events were recognized and 6 zones of martini ( 1971 ) were determined for the upper sediment sequences of sites 1146 and 1148 本文作为大洋钻探项目船下后续研究的一部分,对184航次中的1146站位和1147 、 1148站位的样品进行了分析和研究,在船上科学家已经建立起的地层框架的基础上进一步加密采样,对生物事件标志化石类别进行数量统计,进一步确定了12个生物事件在钻孔中的深度,建立起了两个站位的高分辨率的钙质超微化石生物地层框架。
Multivariate morphometrics was conducted on the endemic asian genus sinibrama wu , 1939 in east asia in order to investigate the morphological variations among the 4 nominal species and subspecies known from south china . principal component analysis ( pca ) was performed respectively for seven meristic and thirty - two morphometric characters that were based on 224 specimens 运用多变量形态度量学方法,研究东亚特有鱼类类群?华鳊属鱼类的形态差异,对其在分类学上存在疑问的物种的不同地理居群的18个框架测量距离、 14个常规测量距离和7个可数性状进行了主成分分析。