查询词典 silviculture

Key Laboratory for Silviculture and Conservation of State Key Laboratory, Beijing Forestry University, Beijing 100083

北京林业大学森林培育与保护国家重点实验室，北京 100083

Key Laboratory for Silviculture and Conservation ,Ministry of Education ,Beijing Forestry University, Beijing 100083, China

北京林业大学省部共建森林培育与保护教育部重点实验室，北京100083

The Key Laboratory for Silviculture and Conservation of Ministry of Education,Beijing Forestry University, Beijing 100083,China

北京林业大学省部共建森林培育与保护教育部重点实验室，北京 100083

To instruct student the development of modem techniques and theories of silviculture and forest protection in the world.

本课程授课目的为使学生认识世界上最新发展之育林及森林保护之观念与技术。

We believe that the discipline of silviculture needs further guidance from the system sciences.

森林培育学需要加强系统科学的指导。

Measures to control the diseases and pests, in which the silviculture measures is the main

设置了51 个永久监测样地，及时进行预测、预报。2004 年取消了化学防治，主要是生物防

The Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University,

1北京林业大学省部共建森林培育与保护教育部重点实验室；2国家林业局调查规划设计院

Natural Ecological Zone will be used for silviculture.

整个工程将于近期分为三期开发实施。

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。

Papers on silviculture (1949～1998) in China are gathered and studied applying the principle and method of literature metrology.

该文应用文献计量学的原理和方法，调研并收集了1949～1998年我国森林培育学科技论文28 053篇。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。