A mallard suddenly took wing, rising steeply into the air with an angry squawk.

一只野鸭突然展翅飞起，愤怒地尖鸣一声直冲天空。

A wild duck (Anas platyrhynchos) of which the male has a green head and neck. Most domestic ducks descend from the mallard.

一种野鸭（绿头鸭），其雄鸟具有绿色的头和颈。大部分驯化了的家鸭都是绿头鸭的后裔。

Here come the mallard couple.

野鸭夫妇过来了。

Mrs. Mallard said it was no good.

马拉太太都说不好。

There are many mallard ducks here.

这里有许多野鸭子。