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园林绿化是城市现代化的重要组成部分。保护和种植高大乔木(以下简称大树)是对环境进行绿化和美化的有效手段。这些大树不仅能创造适宜于人类生活的优美环境,而且还能取得较好的经济效益,几十年树龄的大树是城市生态不可分割的重要组成部分。然而,随着城市化和城镇建设的发展,
Landscaping is an important part of urban modernization. Protecting and planting tall trees (hereinafter referred to as big trees) is an effective means of afforestation and beautification of the environment. These trees can not only create a beautiful environment suitable for human life, but also achieve better economic benefits. Decades of old trees are an integral part of urban ecology. However, with the development of urbanization and urban construction,