查询词典 vegetation

Modern approach methods of geography, ecology, quantitative analysis, expert integration, remote sensing image analysis and geographical information system were combined to reveal the matters in this paper. The eco-geographical background of the research area and the research work studied by other scholars were comprehensively expatiated. The temporal and spatial variation of precipitation and soil moisture, vegetation and soil distribution, and land use/land cover were compared as well. On the basis of foregoing analysis, the eco-geographical differentiation was discussed. According to principles and indicators, with extension engineering method and integrated analysis, the physical geography boundary between subhumid and semiarid areas were demarcated. By using remote sensing image analysis, wavelet analysis of the perennial precipitation and temperature, and the comparison of temporal and spatial variation of the desertification, this paper accounted for the regional response to global environmental change and suggested the dominant environmental problems.

本文采用了地理学与生态学相结合、定量分析与专家集成相结合、遥感图像解译和地理信息系统相结合的方法，对研究区的生态地理背景和已有研究工作进展情况给予了全面的分析和阐述；通过对区域水分条件（大气降水、土壤水分条件）、植被、土壤、土地利用／土地覆被状况等环境要素的时间与空间特征的对比分析，探讨了研究区内部生态地理特征的差异；在一定的原则指导下，通过建立指标体系，以可拓工程方法和模型为支撑，经过综合分析确定了研究区内半湿润、半干旱区界线划分方案；通过遥感图像解译、典型站点多年降水与温度的小波分析、土地沙漠化时空变化的对比分析等，说明了研究区域对全球变化的响应；表明了该区域所面临的主要环境问题。

Based on the ecological characteristics, climate and humidity condition for the vegetation of the sporopollen from the both of the wells, the palaeovegetation types have been reconstructed. The result shows that the paleoclimate changes from tropical semiarid-subhumid climate to subhumid mid subtropical climate to subhumid south subtropical climate.

通过对两口钻井的孢粉植被类型、气温带和干湿度类型及孢粉谱的进一步分析，可将泉头组-青山口组沉积期的气候变化划分为三个演化阶段，自下向上依次为半干半湿的热带气候——半湿润的中亚热带气候——半湿润的南亚热带气候。

To restore submersed aquatic vegetation has been recognized as an effective measure in improving eutrophicated water bodies and reestablishing aquatic ecosystems.

沉水植物的恢复是改善富营养化水体和重建水生生态系统的有效措施。

The objective of the experiment was to determine the best growth habitat of Potamogeton malaianus and provide scientific basis for ecological restoration of submersed vegetation in Lake Taihu.

生长的影响，试图探询太湖马来眼子菜的最佳生长习性，为太湖进行沉水植物生态修复提供科学依据。

It indicates that theXiananshan flora belongs to a transitional type from subtropic to tropic vegetation.A close correlation is established between trichome base density of modern L. formosanaand climatic parameters. The trichome base density of fossil L. miosinica is ca. 10 cm~(-2,indicating that the late Miocene climate in Tiantai is similar to that in nowaday Guangzhou.

现生和化石枫香的角质层上都含有表皮毛／毛基，利用不同地区间现生枫香叶片上表皮毛的变化建立毛基密度(个／cm~2)与气候参数的关系，根据化石枫香的毛基密度(约10个／cm~2)指示了天台晚中新世的气候与现在广州相似。

Some conclusions from the study on human driving factor are:(1) the human activity is much more active factor to the process of desertification which mainly incarnates on the changes of the landuse fashion (from traditional rangeland 100 years ago come to interlacing agro-pastoral region) and enhance of landuse intensity (over-cultivation, over-grassing and over-fuel collection);(2) the natural vegetation had been destroyed suicidally by human activities that had accelerated to the development desertification.

在人为驱动力的分析中，得到以下一些初步的结论：（1）人类活动是本地区沙漠化过程中更加活跃的驱动因子，体现在土地利用方式的转变（从传统的牧业草原到今日的农牧交错区）和强度的增加（过度开垦、放牧、樵采等）；（2）由此对自然植被群落毁灭性的破坏，加速沙漠化的进程。

I dug my cellar in the side of a hill sloping to the south, where a woodchuck had formerly dug his burrow, down through sumach and blackberry roots, and the lowest stain of vegetation, six feet square by seven deep, to a fine sand where potatoes would not freeze in any winter.

我在一处向南倾斜的小山腰上挖掘了我的地窖，那里一只土拨鼠也曾经挖过它的丘穴，我挖去了漆树和黑毒的根，及植物的最下面的痕迹，六英尺见方，七英尺深，直挖到一片良好的沙地，冬天再怎么冷，土豆也决不会冻坏了。

The study on vegetation quantity of Syringa oblata distributed in Harbin is the first time to be carried out in Heilongjiang Province.

该项研究在黑龙江省尚属首次，其研究成果具有很高的理论价值。

A three-dimensional-acoustic Doppler velocimeter is used to measure the velocity near the wall. Measurement of velocity in indirect method is used to determine the tangential stress on the wall. The hair of palm is used to imitate the vegetation.

采用多普勒流速仪测量边壁附近的流速，用间接法中的流速测量法测量边界上的切应力，用棕榈毛作为植物的模拟材料。

In protection zone submit cube to spread cold frozen vegetation tape, the meadow of high mountain and the bush clump of high mountain , fir, dragon spruce and mountainous region frequently green rich leaf will take and do hot valley fill the tape of thick grass, plant kind is numerous.

保护区内呈立体分布着寒冻植被带、高山草甸和高山灌木丛、冷杉、云杉、山地常绿阔叶要带、干热河谷灌草丛带等，植物种类繁多。保护区内有虫草、贝母、珠子参、天麻、雪莲等名贵药材；而兰花、野牡丹等名花随处可见；在浓密的原始森林中，栖息着一类保护动物滇金丝猴、野驴；二类保护动物雪豹、原麝、马麝等。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。