A modified, usually elongated, scale (or group of scales) present at the upper or anterior base of the pectoral or ventral fins in some bony fishes.是什么意思_A modified, usually elongated, scale (or group of scales) present at the upper or anterior base of the pectoral or ventral fins in some bony fishes.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句