1978年，中国开始了一项全国性的植树计划，即三北防护林计划，也被称为“绿色长城”。
In 1978, China began a nationwide tree-planting programme known as the Three North Shelterbelt Forest Programme, also known as "the Great Green Wall".
陕西三北防护林体系建设工程是国家在陕实施的六大林业重点工程之一。
Shaanxi Provincial "Three-North Protection Forest System" development was one of the Six Key Forestry Programs in Shaanxi implemented by the State.
三北防护林体系工程是一项宏伟的千秋工程，她不仅是中国生态环境建设的伟大创举，也是全球生态环境建设的重要组成部分。
Noted as a great splendid program, the three north shelterbelt program is not only a pioneering work in China's eco-construction, but also the important part of national eco-construction.
三北防护林体系工程是一项宏伟的千秋工程，她不仅是中国生态环境建设的伟大创举，也是全球生态环境建设的重要组成部分。
Noted as a great splendid program, the three north shelterbelt program is not only a pioneering work in China's eco-construction, but also the important part of national eco-construction.
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