gadwall的翻译，读音
英/'^ædwɔ:l/
释义：
n. 赤膀鸭
n. A large duck (Anas strepera), valued as a game bird, found
in the northern parts of Europe and America; -- called also gray duck.
n. A large duck (Anas strepera), valued as a game bird, found
in the northern parts of Europe and America; -- called also gray duck.