查询词典 sapling forest

On the basis of summarizing the application of the Penman-Monteith model in forest underlying surface, the evaluating method and significance of many parameters were expounded. The calculating methods of the key parameters were discussed including net radiation, aerodynamics resistance and canopy layer stomatic resistance, some problems were analyzed and some suggestions were given for practical application of this model in forest evaportranspiration research.

中文摘要： Penman—Monteith公式是在蒸散研究中应用最多，也是变化形式最多的方法，该文在对目前Penman—Monteith模型在森林下垫面中应用总结的基础上，阐述了其中众多参数的意义和常用的确定方法，着重探讨了影响该模型精确性的关键因子净辐射、空气动力学阻力和冠层阻力的计算方法，并分析了Penman—Monteith模型在实际应用中存在的一些问题，提出了该模型在今后森林蒸散研究中发展的思路。

First,on the basis of analysis on a concealed basic as- sumption in the present studies,the author points out that unreasonable utilization of forest is not completely as result of unknown-well forest's ecological benefits by human being,but the reasons would be the lacking of special knowledge and unfairne- ss between b...

第一，对现有研究中暗含的一个基本假设进行了分析，指出不合理利用森林的行为并非完全出于人们不知道森林具有生态效益，其原因为：行为者缺乏专门知识；行为者的利益与损失不对称；行为者面临一个短期预期显著大于长期预期的制度背景。

First,on the basis of analysis on a concealed basic as- sumption in the present studies,the author points out that unreasonable utilization of forest is not completely as result of unknown-well forest's ecological benefits by human being,but the reasons would be the lacking of special knowledge and unfairne- ss between benefit...

第一，对现有研究中暗含的一个基本假设进行了分析，指出不合理利用森林的行为并非完全出于人们不知道森林具有生态效益，其原因为：行为者缺乏专门知识；行为者的利益与损失不对称；行为者面临一个短期预期显著大于长期预期的制度背景。

In order to understand the herbage biodiversity and synusia structure of artificial forest, we investigated herbages under five forest types of Populus simonii, Prunus armeniaca. Prunus davidiana, Hippophae reamnoides and Caragana korshinskii.

调查分析了黄土丘陵区5种人工乔灌林小叶杨林，山杏林，山桃林，沙棘林，柠条林下草本层植物的物种组成、结构特征及其差异。

In nature, forest is resource-base, gene-base and power-base which take on the most perfect function. It is very important to maintain terrene environment and ecologic balance. Forest, as the provider of natural resource which is necessary to mankind development, take on significance to social sustainable development.

森林是自然界功能最完善的资源库、基因库、蓄水库和能源库，对维持陆地生态环境，维持生态平衡起着重要的作用，同时森林作为人类发展必不可少的重要自然资源提供者，对社会经济的可持续发展具有极其重要的意义。

John is thaught to have been in the area of Winkton Forest at about 5 o'clock and he is known to have missed his delivery to Forest Farm.

约翰是thaught是在Winkton森林区域在大约5时，并且他被知道错过了他的交付对森林农场。

This paper studied the distribution,flora,physiognomy,construction,regeneration and succession dynanic of Tilia mongolica forest in Wulingshan mountain and advanced measure of protecting and managing forest community.

为了加强天然林保护，在标准地调查和统计计算的基础上，分析研究了雾灵山蒙椴落叶阔叶混交林群落的分布、区系成分、外貌特点、结构特征和群落的更新演替规律，并提出了群落的经营保护措施。

The preferred habitat types of Cabot's tragopan in each season were: evergreen-deciduous forest and the broadleaf strips in spring; the broadleaf strips and shrubs in summer and evergreen-deciduous forest and shrubs in autumn; the habitat selected in winter was the same as that in spring but were more relied on by the birds.

黄腹角雉所偏好的栖息地类型，在春季为常绿阔叶--落叶混交林和人工针叶林中的阔叶林条带；夏季为阔叶林条带和灌草丛；秋季为常绿阔叶--落叶混交林和灌草丛；冬季与春季相同，但对这两种类型栖息地的依赖性比春季更强。

This thesis focus on the introduction and analysis of two advanced software in this field: Onyx Treemaker and Visual Nature Studio. This thesis studied topics about theory, application and programming of forest landscape visualization technique. Also a structure of forest landscape visualization system is issued. And the programming of image transparent, which is one of the key techniques of visualization, is carried out during the study of this thesis.

本论文的研究以引进国外行业内的先进软件为中心，包括理论、应用和开发三个方面，对 Onyx Treemaker 树木造型软件和Visual Nature Studio景观仿真软件的建模方法、绘制技术、使用方法等进行剖析，针对森林景观可视化的需求提出一个可视化系统的功能框架，并对系统中的一个关键技术一图像的透明消隐技术进行了开发。

The former' wave width is medium. It feeds mainly on aquatic small insects of order Diptera and Trichoptera, foraging in 5-20cm above water surface and midium- complicated forest by trawling and aerial feeding. The latter's wave width is shortest, which have disadvantage to discriminate targets from enviroment. It feeds mainly on even smaller insects of order Lepidoptera and Diptera, foraging in wide space or sparse-foliage forest by aerial feeding.

为小型蝙蝠，前者声波带宽中等，主要以水生小型的双翅目、毛翅目为食，在水面5—20cm和中等复杂的林中进行拖网和空中捕食，后者声波带宽最窄，主要以小型的鳞翅目、双翅目昆虫为食，在开阔空间内或稀疏林中进行空中捕食，视觉可能在捕食中具有重要的辅助作用。

My father is over 60 years old, and he lifts weights every day.

我爸爸六十多岁了，他每天都练习举重。

Then in a serious tone she declared:"It doesn't pay, dear boy, to look like a ninny with one's wife the first night."

两眼湿润了，她把身子蜷得很小，这样似乎可以更好地闻闻自己。