食物链

在食物链中，昆虫是相当低的一级生物。

Insects are fairly low down the food chain .

这会对农业和食物链造成威胁，由此而危及人的健康。

This poses a threat to agriculture and the food chain , and consequently to human health .

整个食物链因农业生产过程过多使用化学品而受到影响。

The whole food chain is affected by the overuse of chemicals in agriculture .

其结果就是破坏食物链，使很多动物和那些以捕食它们为生的动物饿死。

The effect was to disrupt the food chain , starving many animals and those that preyed on them

这些变化可能会影响食物链。

Those kinds of changes could affect the food chain ．

这是食物链的一个例子。

It is an example of a food chain .

在食物链中,有些生物是生产者,有些是消费者。

Within a food chain , some living things are producers and some are consumers .

食物链显示一个群落中动物们以彼此为食的顺序。

The food chain shows the order that animals eat each other in a community .

如果他们在这一地区发现了一句动物尸体，他们就会研究这种动物在食物链中的位置，以及它是如何死亡和为什么死亡的。

If they find a dead animal in the area , they study where the animal fits in the food chain and how and why it died .

它既是植物的授粉者，也是扮演食物链的关键角色。

The insects play a vital role in pollination5 and as a food source for birds .

而野猪和野鹿群体数量逐步恢复，老虎的食物链也更加稳定。

As the wild boar and deer populations were gradually restored , the food chain for the tigers became more stable .

被捕食者成食物链的一类n对种群捕食&被捕食生态系统的稳定性

A kind of stability of the ecology system of " predator-prey " of n pairs of preys forming food chain

~（137）Cs、~（60）Co在海水及海洋食物链网中的转移Ⅰ

The transfer of cs 137 and co 60 along marine food web and water I

基于食物链关系评价转Bt基因棉对寄生性天敌的非靶效应

Effects of transgenic Bt cottons on the parasitoid in tri-trophic system

Hg、As、Cr、Cd在食物链中迁移规律的研究

A study on the migrating rule of Hg , As , Cr , Cd elements in food chain

具有扩散和群体防卫的简单食物链的Hopf分支

The Hopf bifurcation for simple food chain with diffusion and group defence

具有群体防卫能力简单食物链的Hopf分歧

A Hopf Bifurcation of Simple Food Chain with Group Defence

具有多时滞的食物链系统的Hopf分支

Hopf Bifurcation of Food Chain System with Time Delays

而土壤-作物系统是农业生态系统的核心，它是农用化学物质施用及污水灌溉等的主要场所，是Cd向人类食物链迁移积累、直接或间接地危害人体健康的关键环节。

As a core of agricultural ecosystem , soil-plant system loads chemicals and sewage , and is the key of transfer of cadmium to food chain .

带时滞的离散4种群Lotka-Volterra型食物链模型周期解

Periodic Solutions of a Discrete Four-species Lotka-Volterra Type Food-chain Model with Time Delays

以水生生态模拟系统研究了不同水生生物对钷（~（147）Pm）的富集性及其通过食物链鱼体的生物放大作用。

Bioconcentration and magnification properties of 147Pm ( RE ) on fish in the aquatic food chain are studied by aquatic ecosystem model .

一类带有Holling型食物链系统的稳定性和持久性

Stability and persistence of a food chain system with Holling type

具HollingⅢ型功能性反应食物链系统周期正解的存在性

Positive periodic solution of the food-chain system with Holling ⅲ type functinal response

环境中的DDT能通过食物链进入生物体，在污染土壤上生长的作物吸收和积累DDT后，会影响其正常的生长和发育。

Crops in contaminated soil could take up and accumulate DDT whereas their normal growth and development would be affected .

而在HTC一路跌跌撞撞的同时，苹果和三星却巩固了在移动市场食物链顶端的位置。

As HTC fumbled , Apple and Samsung solidified their positions at the top of the mobile food chain .

土壤中硒含量异常，通过食物链会影响人畜健康。化学分析结果表明，海南省土壤全硒量为0.043～0.785mg／kg，平均0.295mg／kg；

The Se content in soils of Hainan province ranges from 0.043 to 0.785mg / kg , average content is 0.295mg/kg .

非均匀chemostat中非单食物链模型正解分析

Analysis of Positive Solutions for a Multiple Food Chain Model in an Unstirred Chemostat

这说明对于多时滞的食物链系统，考虑其Hopf分支的存在性方法并不是唯一的。

It is shown that the method of the existence of Hopf bifurcation for the food chain system with multiple delays is not unique .

Chemostat中单食物链模型分歧解的存在性和稳定性

The Existence and Stability of Bifurcation Solution of a Simple Food Chain Model in the Chemostat

重金属镉（Cd）是最危险的环境污染物之一，它通过食物链在人体内积累并危害人体健康。

The heavy metal cadmium ( Cd ), one of the most toxic contaminants in the environment , can be accumulative in human body to an extent that becomes harmful to health through food chains .