Before civilisation intervened, such chronic loneliness would have been so rare ( because isolated individuals are so vulnerable to predation) that evolution would have ignored it. 在文明到来之前,这种常态性的孤独非常罕见(因为单独的个体易被捕食),进化就把它忽略了。
Given that China wasn't too long ago an isolated, impoverished backwater, vulnerable to predation from without and collapse from within, becoming the second most important pillar of the international system would scarcely constitute a 'loss.' 鉴于中国在不久前还是一个受孤立的贫穷落后的国家、易于遭到外部掠夺并容易从内部分崩离析,成为国际体系的第二大支柱肯定算不上失败。
It is particularly important in winter when the risks of predation are high and just one day without food can make the difference between life and death for small birds. 特别是冬季,捕食风险很高,小鸟就一天没有吃的,就得面临被饿死的境地。
The Habitat Use by Red Deer and Roe Deer in Winter and the Home-range Use by Red Deer under Predation Risk 马鹿和狍的冬季生境选择与捕食风险下马鹿的家域利用
Because of reasons such as germination, predation and decay, soil seed banks have seasonal dynamics. 土壤种子库、幼苗库和成年植被相互联系相互影响。
Effect on population dynamics of reed voles Microtus fortis by food, predation and interspecific competition 食物、捕食和种间竞争对东方田鼠种群动态的作用
Establishing that a firm is guilty of predation is difficult. 公司如的确存在掠夺性定价的行为,查实将很困难。
The predation of Anguilla japonica on3 different body lengths of Macrobrachium nipponense was studied based on the predator-prey relationship theory. 采用捕食者.猎物间捕食效应研究方法,研究了日本鳗鲡对3种体长规格日本沼虾的捕食效应。
Also, the competitors and predators of a species often don't reach an island, but competition and predation in the deep sea can be intense. 竞争者和动物天敌通常也不会到达这个小岛,但是深海的竞争和掠食却很猛烈。
The time and intensity of seed predation can be a major selective force in the evolution of life-history traits in plants, such as germination rates and production of a soil seed bank. 捕食者饱和现象被认为是植物和种子捕食者之间的高度协同进化作用的结果,是限制动物破坏种子、提高被扩散种子存活率的一种选择压力。
A distributed delay nonautonomous predation system with feedback controls is investigated, conditions are obtained for the persistence of this system. 研究了一类具有反馈控制和连续时滞的两种群非自治捕食系统,利用微分不等式给出了系统持续生存的条件。
If you are attracting birds to an area, ensure the birds are not exposed to predation from cats and other domestic animals, or dangers posed by artificial hazards. 如果你把鸟吸引出来,确定附近没有猫狗等猎食者,也没有人为的危险。
The predation and spatial heterogeneity on Harmonia axyridis adult to Myzus persicae were determined. 测定异色瓢虫成虫对桃蚜的捕食功能和空间异质性。
Study on Technique for Evaluating Predation on Planthoppers in Rice Ecosystem 天敌对稻飞虱捕食作用的评价方法研究
The course covers productivity and biogeochemical cycles in ecosystems, trophic dynamics, community structure and stability, competition and predation, evolution and natural selection, population growth and physiological ecology. 课程包含生态系之生产力与生物地质化学循环、营养动力学、群落结构与稳定性、竞争与捕食、演化与天择、族群成长,及生理生态学。
And Socrates'answer is, of course, the predation of poetry and the arts in Books II and III. 苏格拉底的回答是,当然,见第,II,与,III,册中,对诗学与艺术的描述。
We thus conclude that the aphids have the ability to detect the presence of P.japonica and adopt initiative avoidance responses to reduce the predation risk. 结论认为,桃蚜可以识别龟纹瓢虫的存在,并对其作出一定的躲避反应,从而降低被捕食的风险。
Predation test shows that a mite eats on average two eggs of housefly per day and four mites consume on average one first instar fly larva per day. 每只雌螨每天平均消耗2个蝇卵,每4只雌螨每天平均消耗1条1龄蝇类幼虫。
Early in man's history, we literally risked our lives against predation to protect our fat stores. 在人类发展历史的早期,我们曾拼命地冒着风险保护我们的脂肪免受其他捕食动物的掠夺。
Predation is even trickier to uncover when goods are sold together. 在捆绑销售商品时,掠夺性定价就更难发现了。
DVM of zooplankton under predation pressure and optimal food intake strategy: simulation analysis 浮游动物在捕食压力下的昼夜垂直迁移与最优食物摄取策略:模拟分析
This paper reviewed the new progress in the theory and hypothesis of population regulation in small mammals, focusing on the food hypothesis, predation hypothesis and multi-factorial hypothesis. 对小型哺乳动物种群数量周期性波动的外因调节假说进行介绍,概述了食物假说、捕食假说和复合因子假说的主要内容和研究进展。
Corporate Governance, Predation of Capital Market and Market-entry Barrier& Case Study on Air China's Bidding for China Eastern 公司治理、资本市场掠夺和市场进入障碍&国航竞购东航的案例分析
Well, ongoing investigations have revealed that predation is the most likely cause of sea otter decline after all. 目前的研究表明天敌捕食是最可能导致海獭数量减少的原因。
And third, the uneven pattern of otter decline is better explained by the orca predation theory than by the pollution theory. 第三,海獭数量变化的不均衡性恰好表明了逆戟鲸捕食理论比污染理论更合理。
Processes such as cell maintenance, uncoupling, Programmed Cell Death ( PCD), starvation, and predation are reviewed, and state-of-the-art information about these processes is summarized. 随后,分别对内源过程中的细胞维持、解偶联、程序化细胞死亡、饥饿状态、高等微生物捕食等过程作了综述,总结了其在污水生物处理领域的研究进展。
Rent-seeking and Poverty: Production, Protection and Predation Model with An Assumption on Heterogeneity 寻租与贫困:基于异质性假设的生产、保护与分利模型
It was concluded that the fluorescence-labeled bacteria technique would be a potential option for determination of bacterial predation rate by rumen protozoa. 结果表明荧光标记细菌技术能够应用于瘤胃原虫吞噬细菌速率的研究。
Induction Problem and Its Significance in Scientific Epistemology; The importance of predation as an exploitation strategy may be summarized under four main categories. 科学认识论中的归纳问题及其意义捕食作用作为一种掠夺性的对策其重要意义可归纳为四个主要方面。
This is part of a larger Government programme to reduce Cormorant predation on commercial fish in the fishponds around Mai Po and Inner Deep Bay. 这样做是为了减少鸬鹚在米埔和内后海湾邻近的商业鱼塘觅食。