基本解釋[經(jīng)濟(jì)學(xué)]灰棕壤詞組短語(yǔ)短語(yǔ)brown grey earth 棕色灰壤grey brown earth更多詞組專業(yè)釋義經(jīng)濟(jì)學(xué)灰棕壤