查询词典 biological population
- 与 biological population 相关的网络例句 [注：此内容来源于网络，仅供参考]
-
Based on a fishery-biological survey of the Yao-Jiang River, ZheJiang Province, carried out during 1976-1977, the writer delineates the ecological properties of fish population and estimates the fish-producing capacity of this river.
本文根据1976-1977年的调查研究，讨论姚江鱼类种群生态特点，并参照对杭州青山水库的一些调查及中国科学院水生生物研究所对武昌东湖的研究，估量姚江的鱼产力，旨在为拟定增产措施提供科学根据。
-
The studied area is located at the tropical area in Xishuangbanna where biological diversity is very rich but ecosystem is weak and Swidden agriculture is popular. With population growing, extensive cultivation and overuse of soil resources has resulted soil and environmental degradation, and restricted continuous development of countryside.
土壤养分和土壤微生物生长代谢水平的衰退是热带山地退化的重要表现形式，二者的变化基本是一致的，即从热带雨林→ 33a次生林→ 6a轮歇地→ 4a轮歇地→旱谷地→橡胶林→荒草坡呈降低趋势；相对于热带雨林而言，不同利用方式土壤微生物和土壤养分状况均有不同程度的下降，且随退化程度增高减幅增大，土壤微生物衰减的速率比土壤养分的衰减更快。
-
To provide basic parameters of evaluating the biological safety of xenotransplantation from pig to human, ear tissues from 31 individuals were randomly collected from a Shazi Ling pig population. PCR and RT-PCR were performed to detect porcine endogenous retrovirus proviral DNA and mRNA respectively. The sensitivity of the PCR was evaluated using a positive control.
为评价从猪到人异种移植的生物安全性提供依据，从湖南沙子岭猪的保种群内随机采集31头个体的耳样组织，应用PCR和RT-PCR技术分别检测这些组织中内源性逆转录病毒（porcine endogenous retrovirus，PERV）的前病毒DNA和mRNA，并对PCR扩增的灵敏性进行评估。
-
Zhou WY%Wei WH Study on population dynamic of polecats and its effective factors Acta Biological Plateau Sinica , 1994,null
张道川%樊乃昌%印红达乌尔鼠兔和高原鼠兔行为特征的比较分析河北大学学报， 2001，1
- 推荐网络例句
-
It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.
从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。
-
The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.
集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐
-
The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.
血精的原因很，以良性病变为主。