ash free meaning in Chinese

无灰的
无灰分的

Moisture ash free coal
无水无灰煤
Habitat changing and its effect on birds were analyzed also . temmporal variation of density , biomass and ash free biomass of macrobenthic and at quanzhou and yunxiao mangrove areas was analyzed . the correlation between macrobenthic and waterbirds on mudflat was discussed
分析闽南沿海地区红树林区鸟类的种类、区系组成和时间动态；讨论红树林对鸟类种类和数量分布的影响；以及生境变迁对鸟类影响。