查询词典 ecosystem

It is one of the most dominant small mammals and plays an important role in keeping the balance of the alpine meadow ecosystem.The aim of this paper was to investigate the level of genetic diversity and also to test the hypothesis of IBD for this old species.Samples of plateau pikas were collected from four natural populations（Haiyan,Xidatan E,Xidatan W and Kunlunshan populations）.

采用多态信息含量、期望杂合度、观测杂合度、基因流和基因分化系数对种群及物种的遗传多样性水平进行分析；计算各种群间的遗传距离、遗传相似度以及遗传距离与地理距离的相关系数，并进行UPGMA聚类分析。

As a key component of aquatic ecosystems,periphyton can absorb nitrogen and phosphorus contaminants,maintain matter metabolism and ecosystem balance in waters.Meantime,for its natural ability,namely, attaching on substrates and being harvested easly,it has become the research focus in recent decades.

周丛藻类作为水生生态系统的一个重要组成部分，能够吸收水体中大量的氮、磷污染物，维持水体的物质代谢和生态平衡；同时，因其自然的附着特性，易于收获，已经成为近几十年来的研究热点。

Cyanobacteria played an important role as the producers in the ecosystem, while the euryhalinous and benthic faunas were the main customers, including low-diversity microgastropods, ostracods, and disaster foraminifers.

蓝细菌作为生产者是该生态系的基础，种类单调的小型腹足类和介形虫等广盐性多细胞生物和灾后残存的有孔虫则是该生态系中的主要消费者。

An important aspect, it is that green marketing again be called the environment marketing ,which is a modern market marketing develops to represent the method of a new marketing thought for then can keep onning the development for until thoughting, look aftering ecosystem level and operation modes.

绿色营销又叫做环境营销，是现代市场营销发展的一个重要方面，它代表了一种以可持续发展为直到思想，照顾生态层面的新的营销思维方式与操作模式。

To understand the role of soil nematodes in the ecosystem re

要全面了解土壤线虫在生态系统中的作用，研究工作必须：(1)结合室内模拟和

Production and supply of ecosystem-based water culture Flower purification and fermentation of biological nutrient solution.

生产并供应生态净化型水培花卉及其发酵型生物营养液。

We are a member of the Cumulative Environmental Management Association, a multi-stakeholder group in the Regional Municipality of Wood Buffalo, to develop and implement management tools to reduce ecosystem disturbance in the region.

我们是一个累积的环境管理协会，在本市区域的伍德布法罗多方利益相关者小组，成员制定和实施管理工具，以减少在该地区生态系统的干扰。

Rice-duck-fish complex ecosystem can obviously improve the content of quick acting nitrogen, quick-acting phosphorus, and organic matter.

稻-鸭-鱼共栖能显著提高土壤速效氮、速效钾、速效磷有机质的含量。

The seasonal pattern of parasitism of the white-backed planthopper, Sogatella furcifera, was investigated in a subtropical double cropping of rice ecosystem in hilly region Jinghua-Quzhou Basin, Zhejiang, China.

在亚热带浙江金衢盆地的丘陵双季水稻田的早、晚稻期间研究了白背飞虱的被寄生和被捕食作用下的存活率。早、晚稻白背飞虱卵被缨小蜂寄生率分别为 1 1 %和 1 6 %，被捕食及未知因子死亡率分别为 2 3%和 1 6 %。

With the improvement of irrigation conditions on cornfield and changes of agricultural ecosystem, wheat aphid cause more losses than ever in wheat productivity.

近年来，随着麦田水肥条件的改善和农业生态环境的变化，麦蚜虫害日趋加重。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48