grey slate [地球科學(xué)]灰色板巖grey scale 灰度等級grey reticular formation [心理學(xué)]灰質(zhì)網(wǎng)狀結(jié)搆grey rational analysis [經(jīng)濟(jì)學(xué)]灰關(guān)聯(lián)理論grey prediction theory [經(jīng)濟(jì)學(xué)]灰色預(yù)測grey predict [經(jīng)濟(jì)學(xué)]灰色預(yù)測grey poplar grey polyester polynosic blended fabric [經(jīng)濟(jì)學(xué)]滌虎混紡坯佈grey pig iron 灰生鉄grey partridge grey nurse shark grey mullet grey mull [經(jīng)濟(jì)學(xué)]麥爾紗坯grey matter 頭腦；智力；腦部和脊椎的灰色神經(jīng)組織grey market 灰市，半黑市grey manila board [經(jīng)濟(jì)學(xué)]灰底白版紙grey literature network service grey literature 灰色文獻(xiàn)grey level [光] 灰度值；[電子] 灰度級grey leaf-spot [環(huán)境科學(xué)技術(shù)]灰色葉斑病