同根派生 primary feather相關(guān)詞英漢例句用作名詞 (n.)Upperwing has pale greyish-white primary bases and often pale rufous or yellowish-brown forewing, paler than dark grey flight-feathers.翼上初級(jí)飛羽呈現(xiàn)灰白色，翼前緣經(jīng)常為淡棕色或黃棕色，比飛羽的深灰色要淺。primary feather更多例句