提供参考

With the society Of city develobing ,the value of urban forestry become More and more affirmable and is taken care by every City in the world ,this paper excerpt the history of Urban forestry and the need of constructing urban forestry ,refer to concept ,category ang area of urban forestry ,introduce the condition of natural and environment,the situation of society and economy of nanning simply, summarize status of forestry resource in nanning, analyze and evaluate urban forestry in nanning about city afforestation ,timber structure,biodiversity ,comprehensive development of forestry ,and so on ,in according with investigation of Nanning citys afforestation in 2000,and suburban forest resource survey in 1999 ,and so on ,suggest the antidote of sustainable development according to the problem existing at present and develobment tendency of ecology ,second, bersist the orientation development of urban forest ,third,persist the principle of "the same three paces"and "the three unity",the last,change the affaire of managed department

随着城市社会经济的发展，城市林业的重要性越来越受到世界各城市的肯定并给予关注和重视。本文引述城市林业的历史以及建设城市林业的必要性，提出城市林业的概念、范畴及其地域范围，简要介绍南宁市城市自然环境条件与社会经济概况，依据2000年南宁市城市绿化普查及1999年南宁市郊区森林资源清查等资料，概述该市林业资源现状，并对南宁市城市林业的城市绿化、林种结构、生物多样性以及林业综合开发等进行分析评价，针对存在问题及城市林业未来的发展趋势提出南宁市城市林业可持续发展的对策：1加强生态文化宣传教育；2坚持城市林业的定位发展；3坚持"三同步"、"三统一"的方针原则；4转变经营部门职能，旨在为南宁市城市林业的建设和发展提供参考。关键词城市林业；城市概况；现状分析；可持续发展

This paper will provide a reference for warrant supervisors to control the underlying risks from an aforehand institutional perspective.

本文的写作目的：针对我国权证市场的实际情况，从制度层面上提出较为前瞻性的防范控制权证风险的策略，以期为监管层提供参考。

The objective of this research is to discuss green food consumers" consuming behavior via consumers" demographic variables , purchase affecting factors, AIO VALS variables and post-purchase and to find out the related factors and VALS variables and demographic variables that affect consumers to choose and buy green food, thus establish main variable measuring indexes and compare the differentiation and influential effect of these indexes themselves and post-purchase, all of which are according as making marketing-mix decision and establishing branding image for green food companies.

本文的研究目的是经由消费者人口统计变量、购买影响因素、AIO生活方式变量和购后评价情况的调查统计分析，来探讨绿色食品的消费者行为，找出影响消费者选择购买绿色食品的主要相关因素和生活方式变量因子以及人口统计变量，建立主要评价变量指标并比较其自身和购后行为的差异性及影响效果，最后为绿色食品企业制定营销组合策略和品牌形象的树立提供参考依据。

This paper introduces the characteristics of the cabin atmosphere of AIP submarine s,presents the particularities and key technologies that applied in the cabin atmosphere control system.

介绍了 AIP潜艇舱室大气环境特点和系统控制的特殊性以及系统控制的关键技术，并为 AIP潜艇舱室大气环境控制系统的设计提供参考。

In this paper,the system principle of the air cooled screw heat pump total heat recovery unit was introduced.

本文对热泵全热回收空调机组系统原理进行了介绍，并通过对风冷热回收机组试验结果的分析，为该类型机组的设计及应用提供参考。

Objective To offer reference of the screening procedure for aircrew and astronaut selection.

目的探讨发作性头痛的脑波涨落图特征，为航空航天作业人员选拔提供参考方法。

In this paper, the main design content and detailed points of anaerobic baffled reactor in engineering were introduced.

本文在总结了现有ABR研究成果的基础上，对其在工程应用中设计时需要考虑的结构形式、部件尺寸、操作条件等问题进行了分析讨论，以期为ABR的进一步研究和工程应用提供参考。

It's analogous to the way people provide references to one another.

这和人们相互提供参考的方式差不多。

This paper detail describes the type,production process and some properties of absorber in anechoic chamber.

详细介绍了电波暗室用吸波材料的种类、制造工艺，以及电波暗室用吸波材料的反射率、阻燃性、耐功率等性能指标，为暗室建造企业在选择吸波材料时提供参考。

The juice extraction rate was 80.3 %. conclusion the results obtained can be applied to the production of angeleno juice beverage.

结论可为安哥诺李果汁饮料的生产加工提供参考。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。