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中文摘要：
城市绿化树种的综合评价，一直以来都是困扰园林工作者的难题。本文以哈尔滨市主要绿化树种（其中的40种）的生态功能（10个主要指标）综合描述和量化评估为例，较全面、系统地介绍了灰色关联度分析方法在树种综合评价中的应用。
英文摘要：
The comprehensive appraisal to urban greening tree species is always a problem troubled botanical garden workers. This article takes comprehensive description and quantitative appraisal to ecological function （ 10 main items） of the main greening tree species （40 of them） in Harbin as example to analyze the application of grey relational analysis more comprehensively and systematically in the comprehensive appraisal to tree species.
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Impact of Elevated CO2 and O3 Concentrations on Biogenic
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