以下为句子列表：
英文: A number of eco-construction projects are initiated, such as reforestation, natural forest protection, Beijing-Tianjin sand control, and natural grassland restoration and etc.
中文: 组织实施了退耕还林、天然林资源保护、京津风沙源治理、天然草原恢复与建设试点等生态建设工程。
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英文: Chins have implemented Natural Forest Protection Project, Grain for Green Program, Fast-growing and High-yielding Progrm, and Shelterbelt Forestry Project etc. in succession since the year of 1998.
中文: 摘要1998年以后，国家相继实施了天然林保护工程、退耕还林工程、京津风沙源治理工程、野生动植物保护及自然保护区工程、速生丰产用材林工程和防护林工程6个林业重点工程。
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英文: How to construct a healthy and stable urban forest ecosystem adapting to city's development and an urban forest landscape which can reproduce the natural forest community's characteristics artistically and show the features of city on the whole, is a new
中文: 如何营建适应城市发展、健康稳定的城市森林生态系统，又能艺术地再现城市自然森林群落特征、从整体上展示地域风貌的城市森林景观，是一个全新而又迫切需要解决的问题。
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英文: THE HICH GROWTH OF PINUS TABULA EFORMIS CARR IN THE NONATURAL FOREST IN THE SECONDARY FOREST REGION OF THE DAQING MOUNTAIN
中文: 大青山次生林区油松人工林的高生长及其GM(n)模型
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英文: A case study on estimating natural forest age with DBH distribution and forest growth model
中文: 天然林林龄的模拟估算及案例
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