greyzem灰色土greyadj.灰色的n.灰色vi.变成灰色=<美>graygrey-brown podzolic soil灰棕壤grey cotton polyester yarn本色棉涤纶纱Grey linear transformation灰度线性变换Grey constellation cluster星座图聚类法grey mould of sweet potato甘薯灰霉病Grey relativity evaluation灰色关联评价grey clustering assessment灰色聚类grey duck small wing quill灰鸭直刀毛grey clustering evaluation灰色聚类分析grey-brown purplish soil灰棕紫泥