(More fully "blue-wing teal") the blue-winged teal, Anas discors, of North America.
Early 18th century; earliest use found in John Lawson (d. 1711), surveyor.
英汉双解词典包含464360条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。