Sān / běi / fáng / hù / lín / gōng / chéng / gǎi / shàn / le / xǔ / duō / dì / qū / de / shēng / tài / tiáo / jiàn

三北防护林工程改善了许多地区的生态条件。

The Three-North Shelterbelt program has improved ecological conditions in many areas.