gray water （grey water 的美式拼寫）。gray value tangential direction [計算機科學(xué)技術(shù)]灰度值切線方向gray value 灰度值；灰值gray substance gray snapper gray scale 灰度；灰階gray pig iron 灰鑄鐵 灰生鐵gray mullet gray mold of jute [生物學(xué)]黃麻灰霉菌gray mold of glumes [生物學(xué)]稻灰霉菌gray mold 灰霉病gray matter 灰質(zhì)，灰白質(zhì)；頭腦，智力gray market transaction [經(jīng)濟學(xué)]灰市交易gray market （美）灰市；半合法市場gray level 灰度gray land market [經(jīng)濟學(xué)]灰色土地市場gray knight [經(jīng)濟學(xué)]灰騎士gray kingbird gray jay gray iron 灰口鑄鐵