urban afforestation species
urban afforestation species
城市绿化树种
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Picea is not only major natural forest resources in Qinghai, but also fine tree species of afforestation and urban greening.
云杉是青海省县主要的天然林资源，也是荒山造林和城镇绿化的优良树种。
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