1.
"They have a flat, Broad Bill, float high in the water, and are swift fliers. Males are slightly larger and more Boldly coloured than females"
喙扁而宽,高漂水上,飞行迅速。雄鸭体型比雌鸭略大,颜色亦较鲜艳。
2.
duck of the northern hemisphere much valued for the fine soft down of the females.
北半球鸭子，雌性有柔软的高价值的鸭绒。
3.
The female platypus, like other mammals,
雌性鸭嘴兽像其他哺乳动物一样，
4.
The female platypus, like other mamals, feeds her babies with milk from her body.
像其他哺乳动物一样，雌性的鸭嘴兽用自己的奶喂养它的孩子。
5.
Molecular Cloning and Sequence Analysis of the Peking Duck Prolactin Receptor Gene and Estrogen Receptor α, β Gene;
北京鸭催乳素受体基因、雌激素受体α，β基因的克隆与分析
6.
The first was that our duck was a female, and second, that something about her wings was very unusual. Instead of folding neatly at her sides, her wing tips turned upside down and stuck straight out.
一是我们的小鸭子是雌的；二是它的翅膀非常特别，不是整齐地收拢在两侧，而是翅尖往下伸出。
7.
An old duck visits the mother duck.
一只老鸭前来造访母鸭。
8.
The duck is short. The duck is short.
鸭子很矮。鸭子很矮。
9.
North American goldeneye diving duck.
北美洲鹊鸭科潜水鸭。
10.
an undomesticated duck (especially a mallard).
非家养的鸭，特指绿头鸭。
11.
adult male of a wild or domestic duck.
成体雄性野鸭或家鸭。
12.
liver, duck, mackerel pate
肝、 鸭、 鲭鱼酱.
13.
Seven little, six little, five little ducks,
七只小鸭，六只小鸭，五只小鸭，
14.
Four little, five little, six little ducks,
四只小鸭，五只小鸭，六只小鸭，
15.
Seven little, eight little, nine little ducks,
七只小鸭，八只小鸭，九只小鸭，
16.
Ten little, nine little, eight little ducks,
十只小鸭，九只小鸭，八只小鸭，
17.
Four little, three little, two little ducks,
四只小鸭，三只小鸭，两只小鸭，
18.
One Little, Two Little, Three Little Ducks
一只小鸭，两只小鸭，三只小鸭