片语

species composition and structure物种组成和结构

Tree Species Composition树种组成

These Native Species Composition这些土着人种构成

fish species composition鱼种组成

species composition and distribution种类组成及分布

plant species composition植物配置

species composition of birds鸟类组成

Species and chemical composition品种及化学成分

tree species composition index树种组成指数

英汉例句

• the characteristics of the species composition in the forest boundary were analyzed by species diversity index, species richness index, species evenness index and species dominance index.

  用物种多样性指数、丰富度指数、均匀度指数和优势度指数，对边际带物种组成的特征进行分析；

• third, species composition and parasited location of scale insects in greenhouses of beijing were analysed.

  第三，对北京地区温室蚧虫种类组成及寄生部位进行了分析。

• methods the night trapping method was used to systemically monitor the species composition and seasonal density fluctuation of rodents at daxie port from jan. 2006 to dec. 2010.

  方法从2006—2010年，采用夹夜法对大榭口岸的鼠类种群的构成、密度、季节消长情况进行了调查。

• fish species composition in seven lakes of the yunnan plateau from 1990s to 2004 were compared to investigate variation and reasons for endangered native fishes.

  根据七个云南高原湖泊近年渔获物的变化情况，探讨了云南土着鱼类的变化特征和濒危的原因。

• objective to investigate species composition of gamasid mites, chigger mites and flea on the rodent in zhuhai port.

  目的调查珠海口岸地区鼠体表寄生虫蚤、革螨、恙螨、蜱、吸虱的种群组成。

• the continuous cropping not only decreased the species diversity, but also changed the species composition and characteristics of the community.

  桉树人工林连栽导致群落物种多样性降低，改变了群落的物种组成及特征。

• property of the plankton species composition and biomass in the wintering ponds are discussed.

  同时讨论了越冬鱼池冰下浮游生物的种类组成和生物量特点。

• the species composition varied in different habitats, places, months and collecting methods.

  不同生境、场所、月份和采集方法其蠓种组成有所不同；

• structure and species composition of degraded plant community, along a human-induced disturbance gradient in dagou watershed of the upper reaches of the minjiang river, were investigated.

  在岷江上游大沟流域，沿着人为干扰梯度，调查了退化榛栎群落的结构及其物种组成变化。

• objective to study the rodent species composition and population dynamics for providing scientific basis to rodent control.

  目的摸清贵州省余庆县鼠种及优势种，研究鼠类种群数量变化规律，为灭鼠工作提供科学依据。

• therefore , it should be emphasized to enhance the self - fertilization capability of forest by adjusting the species composition and increasing the proportion of native broad - leaved species.

  因此，应重视通过调整物种组成，增加阔叶树种比例以增强森林的自肥能力。

• based on the species composition of lake ecosystem, a weighting method of the growth rate of phytoplankton(algae)-weighted growth rate is presented in this paper.

  基于湖泊生态系统的物种构成，本文提出了一种浮游植物（藻类）生长率的加权计算方法──加权生长率法。

• transect a line or belt designed to study changes in species composition across a particular area.

  在一个特定区域中划分出的一条样带，用以研究物种组成的变化情况。

• the dynamics effects of cutting intensity on the tree layer species composition and diversity of natural mixed stand of conifer and broad-leaved trees (low intensity, 13.

  和皆伐）作业对天然针阔混交林乔木层树种组成及物种多样性的动态影响。

• the physiognomy, species composition and the structure of communities in the restoration process in tudiling of mao county on upper reach of minjiang river were studied.

  对岷江上游土地岭生态恢复过程中的群落外貌、物种组成和结构进行了研究。

• to investigate the structure and species composition of urban soil arthropod community is of significance in protecting urban species diversity.

  掌握城市土壤节肢动物的群落结构和物种组成对保护城市物种多样性具有重要意义。

• according to the data selected from bottom trawl fishery resource monitoring in the east china sea from 1997 to 2000, the species composition and seasonal variation of small-sized fish were analysed.

  根据1997~2000年东海区底拖网渔业资源调查资料，分析和讨论了东海区小型鱼类的种类组成和季节变化。

• slope direction also affected the species composition of the wild vascular plants, with the most obvious difference between north and south slope, and the least one between east and west slope.

  坡向对当地的野生维管植物物种组成成分也有明显影响，其中北坡与南坡之间的野生维管植物物种组成差异最大，东坡与西坡之间的野生维管植物组成差异最小；

• after 20 century 70s, fish species composition significant changed on the basis of the species composition of fish-scale-deposition.

  通过鱼鳞种类组成比例的改变，发现上世纪70年代后，鱼类资源结构发生了显着的变化。

• species composition was richer in middle-higher level in coniferous forest and in lower-mid…

  相同栖息集团的种类组成在不同林型中存在一定变化。