Any of several tiny North American birds of the genus Polioptila, having bluish-gray and white plumage, a long tail, and a small, slender bill.是什么意思_Any of several tiny North American birds of the genus Polioptila, having bluish-gray and white plumage, a long tail, and a small, slender bill.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句