查询词典 deterioration

1Niche construction can lead to stable coexistence of diverse genotypes in spatially structured population, which supports a stable polymorphism even without heterozygote superiority.(2)With habitat deterioration, niche construction accelerates the formation of steady polymorphism and hence impedes the harmful influences of environment on the population, which might embody a life-history strategy of organism under the unfavorable environment.(3)Niche construction results in the coexistence with alternative polymorphism through genotype-environment feedback and limited gene flow.(4)The niche-constructing organism is an active force to alter its environment and hence the direction of natural selection in order to better survival.(5)Spatial dynamics and distribution pattern of metapopulation are profoundly influenced by time-lagged niche construction.(6)Metapopulation size can reach a fixed level in the recency effect and equal weighting of time lag but is statistical stability in primacy effect, which implies the primacy effect is most remarkable.(7)The increment in the relative weightingof each generation\' niche construction and the length of time lag are significant factors for system destabilization.(8)Moderate capacity of positive niche construction benefits the metapopulation persistence.(9)The narrowing of niche breadth can decrease the metapopulation size and thereby increase the extinction risk.(10)The coupled function of time lag and niche construction make the system oscillation and generate the spiral wave, spiral-broken and circular wave in heterogeneous habitat.The spatial distributions of metapopulation and resource content are complementary due to a phase lag of their both frequencies.(12)Metapopulation persistence with niche construction depends not only on the balance between colonization and extinction, but also on the balance between the ability of niche construction and natural dissipation of habitat.(13)Metapopula-tion can survive under certain condition when the percent of suitable patches in habitat is lower than the ration of extinction to colonization.(14)Two thresholds exist in the process of transition of habitat quality dynamics from unsuitable to suitable, which include the intensity of niche construction and the initial condition of system.(15)Metapopulation size is positive correlated with the ability of positive niche construction, which means that organism or population who has strongly positive influences on their environment plays an important role to maintain the available habitat.

通过上述几个方面的研究，主要得出以下15条结论：(1)生态位构建可使空间结构种群，甚至是在没有杂合子优势的条件下，形成多种可能的稳定基因型分布模式；(2)随着环境的破坏与恶化，种群的生态位构建作用加速其较早形成稳定多态以阻碍环境对种群的不利影响，解释了有机体在不利环境下的一种生活史对策；(3)生态位构建作用通过基因型—环境反馈机制及有限的基因交流导致基因型多态的稳定共存；(4)有机体的生态位构建作用是一种积极的动力改变环境进而改变其自然选择的方向；(5)生态位构建的时滞作用对集合种群动态和空间分布产生深刻影响；(6)集合种群大小在时滞的崭新效应和等权重效应下达到一固定值，而在首位效应下达到统计稳定，表明首位效应的影响最显著；(7)首位效应下生态位构建相对权重的增量和时滞的长度是影响系统不稳定性动态的关键因素；(8)适中的生态位构建强度有利于集合种群的续存；(9)生态位宽度变窄会减少集合种群的数量从而增加其灭绝风险；(10)时滞和生态位构建的双重作用使系统产生周期振荡，并在异质性环境中产生稳定的螺旋波，破碎的螺旋波和环形波三种分布模式；(11)集合种群与资源含量的空间分布因为相滞而互补；(12)具有生态位构建的集合种群续存不仅取决于侵占率与灭绝率之间的平衡，而且依赖于生态位构建能力同其生境的自然消耗速率之间的妥协；(13)当生境中适合侵占的斑块比例小于其侵占率与灭绝率之比时，生态位构建作用促使集合种群在一定条件下续存：(14)生境斑块的状态从不适合到适合转变过程中存在生态位构建强度和系统初始条件这两个阈值；(15)集合种群的大小同正生态位构建能力正相关，意味着对环境具有较强正作用的有机体对维持有效生境起积极作用。

Epilepsy characterized by clonus of muscle groups and progressive mental deterioration and genetic origin.

肌肉抽筋大脑逐渐衰退的一种癫痫。

Second is the real economy is not optimistic on the 10th decline in the PPI index exceeded market expectations, combined with 11 published CPI index, the deterioration of the real economy does not support the market up.

第二个是真正的经济不是在PPI指数10日下跌超过市场预期的乐观，有11个公布的消费指数，实际经济的恶化不支持相结合的市场上。

If the projections are accurate, and the weak dollar boosted international commodity prices on the one hand, China's imports increased costs; On the other hand, makes the economic benefits of the sale of raw material deterioration, more willing to expand production, increase the supply of global tensions.

如果上述预测准确，弱势美元一方面提升了国际商品价格，增加了中国的进口成本；另一方面使得原材料出售者经济收益恶化，更加不愿意扩大产量，加剧全球范围供应紧张状况。

Competition in the market has led to goods being produced cheaply and a consequent deterioration in quality.

市场上的竞争导致了商品的廉价生产，随之质量也下降了。

Urbanization bring people creature comfort, convenient infrastructure for daily life and efficient communication of information with the problem of human settlement deterioration such as environmental pollution, traffic congestions and housing crunches and so on.

城市化在给人们带来充裕的物质享受、便利的生活设施和高效的信息交流的同时，也给人们带来了许多诸如环境污染、交通拥挤、住房紧张等人居环境恶化问题。

This craft did not cause the deterioration of cupreous resistor function, have conduce to those who maintain circuit stability is low diffuse rate.

该工艺未导致铜电阻机能的劣化，并存在有助于保持电路不乱性的低涣散率。

Thus, in the crisis-hit countries themselves, the consequence of the private sector cutback has been the fiscal deterioration.

因此，在遭受危机打击的国家，私营部门削减支出的后果是财政状况恶化。

In other words, the deterioration in the fiscal position is a result of the cutback in the private sector's spending, not a cause of it.

换言之，财政状况的恶化，是私人部门削减支出的结果，而非起因。

Quantitative assessment of human activity intensity was a basis of analyzing impacts of human activity on evolution of hydrological cycle, and also a basis of finding ecological environment deterioration in the catchment.

人类活动强度的定量评价是分析人类活动对水循环演化影响的基础，也是寻找流域生态环境退化原因的依据。

Panorama Many people are dancing in a large sitting room.

在一个大客厅里，许多人在跳舞。

We fully understand how a microwave oven cooks food, it is first necessary to talk ...

我们充分理解一个微波炉煮的食物，这是首先要谈。。。