1.
North American goldeneye diving duck.
北美洲鹊鸭科潜水鸭。
2.
Anatidae Bird Community of the Yellow River Wetland in Shaanxi Province
陕西省黄河中游湿地冬季鸭科鸟类群落结构
3.
"duck:any of various wild or domesticated swimming birds of the family anatidae, characteristically having a broad, flat bill, short legs, and webbed feet."
"鸭:鸭科的一种野生或家养游禽,其特点是有宽大扁平的喙,短腿和带蹼的足."
4.
Any of various wild or domesticated swimming birds of the family Anatidae, characteristically having a broad, flat bill, short legs, and webbed feet.
鸭鸭科的一种野生或家养游禽，其特点是有宽大扁平的喙，短腿和带蹼的足
5.
The Cognizant and Scientific Connotation of the Ugly Duckling Theorem and Its Corollaries;
丑小鸭定理及其推论的认知科学涵义
6.
Any of various amphibious dinosaurs of the genus Anatosaurus and related genera that had webbed feet and a ducklike bill.
鸭嘴龙鸭嘴龙属的两栖恐龙中的一种或其它相关科属中的一种，长有蹼足和象鸭嘴的喙
7.
American scientists have discovered a fossil of a duck?sized, flightless dinosaur,
美国科学家发现了一个鸭子大小的化石，那是一只无法飞行的恐龙，
8.
scientists know less about the platypus than they would like to know.
科学家们掌握的关于鸭嘴兽的知识要比他们想掌握的知识少得多。
9.
An old duck visits the mother duck.
一只老鸭前来造访母鸭。
10.
The duck is short. The duck is short.
鸭子很矮。鸭子很矮。
11.
an undomesticated duck (especially a mallard).
非家养的鸭，特指绿头鸭。
12.
adult male of a wild or domestic duck.
成体雄性野鸭或家鸭。
13.
liver, duck, mackerel pate
肝、 鸭、 鲭鱼酱.
14.
Seven little, six little, five little ducks,
七只小鸭，六只小鸭，五只小鸭，
15.
Four little, five little, six little ducks,
四只小鸭，五只小鸭，六只小鸭，
16.
Seven little, eight little, nine little ducks,
七只小鸭，八只小鸭，九只小鸭，
17.
Ten little, nine little, eight little ducks,
十只小鸭，九只小鸭，八只小鸭，
18.
Four little, three little, two little ducks,
四只小鸭，三只小鸭，两只小鸭，