渠道化

The suggestions employed on different river segments included buffer strips, wetland creation and restoration, habitat diversity creation and near-nature engineering, separately could alleviate human disturbances and canalization effects, link broken river corridor, and improve habitat quality and biodiversity.

此外，鉴於B河段河川渠道化日益加深，导致河流廊道潜在栖地消失与河廊联系中断的情形，建议以近自然工法护岸及护堤的规划加以改善。

This article introduces the development and the evolution of IT channel in our country, focusing on the IT channel pattern based on the electronic commerce. Analysis from transformation of value chain explains electronic commerce the fundamental reason which affects the IT channel. Various analyses which IT channel is affected by electronic commerce have been carried out. The relationship between the consumer network purchase behavior and the IT electronic channel has been explained, and necessity of the middle man electronic commercialized pattern had been discovered. Standing on the previous research, this article summarizes the tendency of IT channel development and predicts the future of orientation of IT channel so as to provide some principles for medium and small sized channel members. In the last part of the article, it visualizes the future new IT channel pattern from the angle of economics.

本文介绍了我国IT渠道的发展与演变过程，重点分析了基于电子商务的IT渠道模式，从价值链的改造这个角度进行分析，说明电子商务对IT渠道影响的根源所在，对电子商务影响IT渠道这一事物进行了各种层次和角度的分析，解释了消费者网络购买行为和IT电子渠道中产品选择的关系，揭示了中间商电子商务化的必然性，在以上研究的基础上，总结了IT渠道的当前发展趋势后，本文结合以上研究内容，做出对IT渠道走向的预测，为中小型渠道成员的战略选择提供了一定依据，最后从经济学角度出发做出了对未来IT渠道新模式的构想。

The stress on river ecosystem in urban area is discussed that result from both rivers channelization and gardening.It is point out that rivers gardening in vogue is man-made process.

摘 要：讨论了渠道化和园林化对于城市河流生态系统的危害，指出当前盛行的城市河流园林化是新一轮河流的人工化改造。

In the construction of the flood control projects, it is necessary to give attention to the ecological requirements by reasonably adopting the technologies of the ecological engineering in order to alleviate the negative effects from the hydraulic projects and avoid both the channelization and the discontinuities of the natural rivers.

在防洪工程建设中，需要兼顾生态需求，合理引入生态工程技术，减轻水利工程对河流生态系统的负面影响，避免自然河流的人工渠道化和非连续化。很多发达国家的堤防工程规范中已明确提出了这方面的要求，并发布了有关的技术导则或手册。

H. Waddington, who also helped explain its developmental mechanisms.

沃丁顿创造的，他也解释了渠道化的发育机制。

This, then, is an example of genetic canalisation.

这就是遗传渠道化的一个例子。

Canalisation is a measure of the ability of a population to produce the same phenotype regardless of variability of its environment or genotype.

渠道化是一个群体产生相同表型的能力程度，不论其环境或基因型的可变性。

Canalisation is divided into genetic and environmental canalisation; genetic canalisation refers to distinct genotypes producing the same phenotype, while environmental canalisation refers to the same genotype producing the same phenotype in spite of environmental variation.

渠道化分为遗传渠道化和环境渠道化。遗传渠道化是指不同的基因型产生相同的表型；而环境渠道化是指不论环境变异，同一基因型产生相同的表型。

The reasons of water cycle being destroied are as follows: Because of the forest-steppe vegetation destroied and water and soil erosion, water resource conservation layer is destructed, and surface water and groundwater of mountainous areas is also damaged. Groundwater is damaged as a result of poor drainage of mining industry. The river channelization destroies surface water and wetland groundwater. The plain groundwater is damaged because of excessive exploitation. The decreasing of actual evaporization destructs precipitaion cycle.

发现了自然水循环各环节被破坏的原因：森林草原植被破坏和水土流失，破坏了水源涵养层，破坏了山区地表水和地下水；矿业不良排水破坏了山区地下水；河流渠道化破坏了地表水和湿地地下水；过量开采破坏了平原地下水；陆地实际蒸发量的减少，破坏了大气降水循环。

Coastal plain and its experience and lessons are introduced in the paper.

介绍了美国沿海平原渠道化洪水控制的经验和教训。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。