1.
Study on the Optimum Dietary Protein Levels for the Mallard Ducks in the Different Growing Periods;
绿头野鸭不同生长阶段适宜蛋白水平的研究
2.
A wild duck(Anas platyrhynchos)of which the male has a green head and neck.Most domestic ducks descend from the mallard.
绿头鸭一种野鸭（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
3.
freshwater duck of Eurasia and North Africa related to mallards and teals.
欧亚大陆和非洲北部的淡水鸭，与绿头鸭和短颈野鸭有亲缘关系。
4.
an undomesticated duck (especially a mallard).
非家养的鸭，特指绿头鸭。
5.
Any of a breed of common domestic ducks descended from and resembling the mallard.
鲁昂鸭一种与绿头鸭相似并是其后代的普通家养鸭
6.
A North American wild duck(Aythya valisineria)having a reddish - brown head and neck and a whitish back.
帆布背潜鸭一种北美野鸭（帆背潜鸭），头颈呈红褐色，背呈浅白色
7.
A fish - eating duck(Mergus merganser), the male of which has a glossy greenish - black head and a white body.
秋沙鸭（普通秋沙鸭）属的食鱼的鸭，雄性秋沙鸭头部光滑，呈墨绿色；鸭身呈白色
8.
Both the matured and juvenile flukes are secured in the bursa Fabricii of a mallard duck, Anas piatyrhynchos Linné.
标本发现於绿头鸭(Anas platyrkynchos Linné)的腔上囊中。
9.
American widgeon the male of which has a white crown.
美洲野鸭雄性的头冠为白色。
10.
He drove these wild ducks on the bow into the water with a punt-pole.
他用篙子把船头的野鸭赶下了水。
11.
Jim: I like the little green ducks. Those little green ones are mallards.
吉姆：我喜欢这些绿色的小鸭子，这些小东西是野鸭。
12.
A Green Interpretation of Henrik Ibsen's The Wild Duck
绿色之思 道德之艺——易卜生戏剧《野鸭》的现代阐释
13.
Complete Mitochondrial Genome Sequence Analysis of Mallard and Phylogeny of Anatini
绿头鸭线粒体基因组全序列分析及河鸭类系统发育
14.
Determination and Analysis of Mitochondrial ND2 Gene Sequence of Anas platyrhynchos
绿头鸭线粒体ND2基因全序列测定及其研究
15.
a wild cat, giraffe, duck
野猫、 野生的长颈鹿、 野鸭
16.
adult male of a wild or domestic duck.
成体雄性野鸭或家鸭。
17.
This duck is a cross between a wild duck and an ordinary duck.
这种鸭子是野鸭和普通鸭子的混种。
18.
Barbary duck is a cross between a wild duck and an ordinary duck.
巴巴里鸭系由野鸭与普通鸭杂交而成。