短语词组短语Niter Farming 欧洲的硝石农法niter air 硝气niter balls [材]硝石球niter method 硝石法natural niter 天然硝石soda niter [矿物]钠硝石;硝酸钠niter pot 硝石罐niter paper 翻译;硝石纸;气喘纸 返回 niter