查询词典 sapling forest

It is closely related to other successive courses such as Forest Ecology, Silviculture, Forest Management, Natural Reserve Conservation and Wildlife Protection.

树木学是林学专业的一门重要的专业基础课，它与森林生态学、造林学、森林经理学、自然保护学等都有着密切的关系。

The main topics of this course include forest trees seeds, silviculture and forest protection.

森林学2主要课程内容包括林木种子学，育林学及森林保护学。

Our results show that there were no significant difference in insect species and abundance between the massion pine forest and the slash pine forest.

通过对6种不同林分结构下的马尾松林和湿地松林内昆虫群落调查与多样性指数分析，表明2种松树内的昆虫种类和数量无显著差异，混交林中的昆虫群落的种类和数量比纯林多，尤其以捕食天敌类群的种类和数量更为明显。

Formosana from mason pine forest and slash pine forest.

马尾松和湿地松是我国南方的2种主要松树。

Even ancient trees plan as towering in the forest, Cicada sound show the forest to be quieter; wild cane is as dragon flying and snake dance, bird sound illustrate more secluded valley.

林内竟然古树参天，蝉噪林愈静，野藤龙飞蛇舞，鸟鸣谷更幽。

Due to the forest litter layer is thicker than the grassland, its soil structure is looser and has higher water and organic matter content in the solum. In addition, the rhizomatic growth of forest community vertical structure has obvious differences on the herbosa in the pore size distribution and the infiltration rate.

结果显示森林地的枯枝落叶层为厚，使其土壤结构较松散，并会增加表层土壤水分保持及有机质含量，再者森林及林下植物相较于草类根系的生长及分布情况，对于不同土壤深度之大小孔隙的比率及水分入渗速率具有明显的差异。

The influence of environmental variables on distribution of PAHs(1) The concentrations of PAHs were higher in warm temperate zone and subtropical zonethan in low temperature zone;(2) The concentration in plain, hilly land and Ya\'an mountainousregion were higher than in other places;(3) The concentration in paddy fields, dry land andforests were higher than in artificial land and grass;(4) There was positive correlation betweenthe concentration of PAHs and TOC. The correlation was more obvious for 4-rings PAHs thanfor 5-, 6-rings PAHs;(5) The concentration of PAHs in acid soils was higher than in alkali andneutral soils;(6) The concentrations in conifer and spinney forest were higher than inbroad-leaved forest.Part two: The temporal and spatial distribution characteristics of POPs at Basin-MountainTransect.

环境因素对多环芳烃分布的影响(1)温带和亚热带地区土壤多环芳烃含量高于低温地区土壤中多环芳烃含量；(2)在平原、匠陵和雅安市附近的山区多环芳烃含量高于其他地区含量：(3)水田、旱地和林地多环芳烃含量高于建筑用地和草地中含量；(4)多环芳烃含量和土壤总有机碳含量成正比，四环多环芳烃与总有机碳的相关性高于其他多环芳烃的相关性；(5)酸性土壤中多环芳烃含量高于碱性和中性土壤中含量；(6)针叶林和灌木林多环芳烃含量高于阔叶林中的含量。

On the network of 3-dimensional perspective projcction transforming and the forest resource DBASE data, the color forest stereogram can be drawn. The problem of the railway linear base will succed in being solved.

通过三维图象的透视投影变换和与森林资源 dbase 数据的联网，可绘制彩色森林立体专业图，并成功地解决了铁路线型库的问题。

The rain forest contains many varieties of these strangler fig trees, and their fruit is a critical food source for numerous rain forest dwellers, including monkeys, civets, butterflies, and ants.

热带雨林包含许多各种各样的绞杀植物的无花果树，它们的果实是危险的食物来源对于许多雨林居民，其中包括猴子，麝猫，蝴蝶，和蚂蚁。

By regarding the forest-sum growth-cutting rate as the control variable and judging its optimality by "norm minimum", we have given a existence theorem of the optimal control for the area distributing systems of forest trees by utilizing space L2(0,T)'s reflexivity, smoothness and strict convexity.

本文将林木总和长消率作为控制变量，以"范数最小"来衡量其最优性，利用空间L2（0，T），T＞0的自反、光滑和严格凸性，给出了森林面积分布系统最优控制的一个存在性定理。

What was it that made you want to change sider ?

是什么使你临阵倒戈？

I don't know what he wants, but let's play along with him.

我不知道他要干什么，可我