Adult winter Mongolian Gull: This bird has new primaries with white tips (Mongolian is the first of the three species to complete its primary moult).是什么意思_Adult winter Mongolian Gull: This bird has new primaries with white tips (Mongolian is the first of the three species to complete its primary moult).在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句