Blue-and-white Flycatcher has narrow white vertical line on throat and lacks pale tips to greater and median coverts (which form weak wing bars on Narcissus).是什么意思_Blue-and-white Flycatcher has narrow white vertical line on throat and lacks pale tips to greater and median coverts (which form weak wing bars on Narcissus).在线翻译_英语_读音_用法_例句