常见例句用作名詞 (n.)Upperwing has pale greyish-white primary bases and often pale rufous or yellowish-brown forewing, paler than dark grey flight-feathers.翼上初級飛羽呈現灰白色,翼前緣經常爲淡棕色或黃棕色,比飛羽的深灰色要淺。 返回 primary feather