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- The biological decomposition coefficient (BDC) of N, P, and K in dead roots and fallen needles appeared the increasing trends with forest age, and was 0.7-1.5, 1.1-1.7, 1.0-3.5, and 0.9-1.3,1.1-1.7,1.0-1.3, respectively. a-~1。 凋落物层中的N、P、K贮量随林龄增大呈先增加后减少的趋势;全氮、全钾、全磷贮量的变化范围分别为142.;76-534
- Econometrics and forest resource evaluation methods are adopted to decide the environmental and timber benefit functions of forest ages. 运用计量经济分析和森林资源价值评价方法获得案例点水源涵养林木材效益、环境效益关于林龄的函数。
- The forest will act as a defense against desert dust. 森林能起防御沙漠灰沙的作用。
- He prefers to assort with people of his own age. 他更喜欢与自己的同龄人交往。
- Even the best quality rubber will perish with age. 就是最佳质量的橡胶也会因老化而腐烂。
- He come to the fore as a physicist at an early age. 他在早年就成了杰出的物理学家。
- The average age of the boys in this class is fifteen. 本班男生的平均年龄是十五岁。
- It is said that there are wolves in this forest. 据说这片森林里有狼。
- Education should not be restricted to any one specific age group. 教育不应限制在任何特定的年龄组上。
- It was difficult to tell his exact age. 很难判断他到底多大岁数。
- A large part of Africa is made up of thick forest. 非洲的大部分地区都是密林。
- There is a leafy forest in our hometown. 在我们的家乡有一片树叶茂密的森林。
- The annular markings on a tree indicate its age. 树的环形纹理显示其年龄。
- There is a pine forest near our house. 我们家附近有片松树林。
- Age and wedlock we all desire and repent of. 成年与婚姻,均为我辈所欲,亦为我辈所悔。
- Billows of flame swept through the forest. 熊熊烈火席卷森林。
- Her widowhood condemns her to a lonely old age. 守寡使她不得不过着孤独的晚年生活。
- The forest was almost impassable. 森林几乎不可逾越。
- I don't think he looks his age of seventy. 我感到他看起来不像70岁的人。
- He has always assorted with men of his age. 他总是与和他年令相仿的人交往。