查询词典 rain forest

The water conservation benefit of soil for different forests was 277.28%-173.67% higher than that of grass slope, among them, the highest one was birch and larch mixed forest, the followings were larch planted forest, Chinese pine planted forest, birch natural forest, and the lowest one was natural shrub forest.

林地土壤的涵养水源效益比荒草坡高277.28%~173.67%，其中白桦落叶松混交林最高，落叶松人工林、油松人工林、白桦天然林次之，灌木林最低。

In this paper,based mainly on the heights above sea level of the upper limits of the modern dark coniferous forest zones in some mountainous regions and the climatic data obtained from 102 meteorological stations in China,the theoretic altitude of the forest line has been calculated and maps showing the altitude isolines of the forest line,the isolines of height differences between the permafrost limits and the forest line and the isolines of height differences between the modern climatic snowline and the forest line in China have been constructed respectively.

本文主要根据我国一些地区现代暗针叶林带上限的海拔高程和102个气象台站的气象资料，计算出我国的森林线的理论海拔高度，并编绘出我国的森林线高程等值线图以及多年冻土线与森林线高差等值线图和现代气候雪线与森林线高差等值线图。

Firstly, according to study dynamic changes of the elements structures in succession about natural and artificial forest, then summarized regular patterns;at the same time.based on the study of Coupling Relationship between structure and function of water conservation forest established the ideal structures from the stand level and the watershed level. The ideal structures from the stand level: uneven-aged, double layer and mixed structure, and trend to natural forest. The watershed level followed the same principle, that is double layer patches, uneven-aged forest well-distributed and to build up different forest patches in watershed.

首先，经过对北京山区水源林天然林和人工林结构要素的演替动态研究，提出其发展规律，同时依据水源林结构与功能耦合关系研究，从林分层次和流域层次上分别构建了水源林的理想结构，其中，林分层次上水源林的理想结构为：异龄、复层、混交的结构状态，林分结构趋于天然林结构的特征；在流域层次上水源林的理想结构为也应形成&复层&、&异龄&、&混交&的结构，即：在流域各水源林斑块间形成林冠层复层、斑块内部乔木、灌木、草本层的复层；不同水源林年龄面积上的均匀分布；形成不同水源林斑块间的镶嵌分布。

The system implemented forest fire model selection automatically and intelligently. BP artificial neural network model of forest fire model selection was build by treating forest fire environment data as inputting variable and treating appropriate forest fire model as outputting variable. At the same time, we studied the methods of acquiring and calculating data of inputting and outputting. The system implemented machine of model selection automatically based on dynamic data driven technology. We selected 72 items experimental data from historical forest fire records in Beijing to experiment and confirm the validity of model selection. It turned out that the reliability of model selection is more than 80 percent.

3基于BP人工神经网络方法设计了林火模型适宜性选择技术框架结构，通过神经网络形成林火模型选择知识，实现了林火模型的自动化和智能化选择；以火场环境因子为输入变量，以适宜火场环境模拟的林火蔓延模型作为输出变量，构建了林火模型选择神经网络模型；研究了输入、输出因子数据的获取与计算方式，实现了动态数据驱动的林火模型自动选择机制；以本京市为例，选择了有详细火场情况记录的72场林火作为实验样本，其中60条记录作为学习样本集，12条记录作为验证样本，对神经网络进行了学习和验证，实验结果表明，模型选择精度可达到80%以上。

Xi'an yesterday a "mud rain " Xi'an yesterday a "mud rain " Yesterday morning it started to rain in Xi'an but people will not feel under the rain but mud and dropped the car almost all the raindrops on the glass became a little mud the cars are parked outdoors into a "big painted face "rustic also filled with the air smelled of earth an umbrella if you do not go out not take a few minutes the body are also covered with mud is very uncomfortable.

西安昨日出现"泥雨"昨日凌晨，西安下起了小雨，但市民却感觉下的不是雨，而是泥，落在车上、玻璃上的雨滴几乎都成了泥点点，停在户外的小汽车都变成了"大花脸"，土里土气的，空气中也弥漫着一股土腥味，假如不打伞出门，用不剿几分钟身上也都充满了泥水，令人非常难受。

Acid rain the ozone layer 空气污染 acidic pollution ozone air pollution causes of acid rain chemical products trees SO2 O2 HCl condition of the ozone layer effects of acid rain acidic rain àHow measure acids atmosphere

空气污染(学科：化学年级：高中三年级)执教者：市北中学徐云蕾 1、空气污染已经成为人们关注的话题，本节课主要讨论空气污染的两个方面：酸雨和臭氧层空洞。

And the perfect Q-vector was applied to diagnose a heary rain process for August 3～5, 1996. The results showed that there were more advantageous using the perfect Q-vector, and suggested that the perfect Q-vector could clearly reveal the system development of the heary rain; the divergence center or line, the divergence field and the frontogenesis function field of the perfect Q-vector could be used to locate the heary rain area; the center magnitudes of the perfect Q-vector divergence field and the frontogenesis function field could be signified the intensity of the heary rain.

结果表明，完全Q矢量能较清楚地揭示暴雨天气系统的演变；考虑了湿过程的完全Q矢量在暴雨的诊断过程中显示了其更大的优越性；定性而言，完全Q矢量散度的辐合中心或辐合线、散度场和锋生函数场有助于确定暴雨的落区，暴雨区正好落在低层完全Q矢量散度场辐合中心和锋生函数场正值中心之间；定量而言，低层完全Q矢量散度场辐合中心和锋生函数场正值中心大小对暴雨强度有显著的指示作用。

In the initial stage, there is little ice particles, and the rain water form mainly through the collection of cloud water and auto-conversion process. In the growing and mature stage, both the cold and warm rain processes are important. The collections of rain water and graupel with cloud water and the melting of graupel are very important to the rain water. Graupel grows mainly through riming cloud water and colleting snow.

在上述成功模拟的基础上，又对γ中尺度对流系统作了探讨发现，γ中尺度对流系统在不同发展阶段的微物理机制不同：初生阶段时，冰相粒子含量较少，雨水的增长以暖雨过程为主，即依赖碰并云滴和云雨自动转化形成；发展和成熟阶段时，冷雨和暖雨过程并存，雨、霰碰并云水和霰的融化对雨水的形成非常重要，霰主要通过淞附和霰碰并雪增长，雪主要通过淞附增长。

Rain fell on the roof of the barn and dripped steadily from the eaves. Rain fell in the barnyard and ran in crooked courses down into the lane where thistles and pig weed grew. Rain spattered against Mrs. Zuckerman's kitchen windows and came gushing out of the downspouts . Rain fell on the backs of the sheep as they grazed in the meadow.

雨水落在谷仓顶上，不停的从屋檐上滴落下来；雨水落到谷仓院子里，弯弯曲曲地一道一道流进长着蓟草和藜草的小路；雨水噼噼啪啪地打在朱克曼太太的厨房窗上，咕咚咕咚地涌出水管；雨水落在正在草地上吃草的羊的背上。

Autumn will do, cold rain slightly cold, the rain outside the window is a gurgling, Ringing in the rain curtain, like fallen leaves Piaofei, it seems quiet night flyings; lamp is Qingqing of tea, a touch of books and poetry so rich, so that state of mind blowing , then let me and the poetry of traction with the ancestors, dial cloud wearing fog, rain to experience what that is, actually improves their days are short, allowing nights are long, people can be singing through the ages.

秋日将尽，冷雨微寒，窗外是潺潺的雨声，萧萧的雨幕，象落叶飘飞，似静夜飞花；灯下是清清的茶水，淡淡的书香，令诗情浓郁，让心绪飞扬，那就让我且随先人诗词的牵引，拨云穿雾，去感受雨为何物，竟能使昼短，能让夜长，能被人千古吟唱。

Just so you know where we're going...

只要让你知道我们的目标。。。

One of his friends acted as the gobetween in his business.

在这件事中，他的一个朋友充当了中间人。