any of numerous usually small spiny-finned fishes of the family Gobiidae,having the pelvic fins united to form a suction disk是什么意思_any of numerous usually small spiny-finned fishes of the family Gobiidae,having the pelvic fins united to form a suction disk在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句