1.
an undomesticated duck (especially a mallard).
非家养的鸭，特指绿头鸭。
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.
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
5.
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。
6.
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
7.
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
8.
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
9.
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
10.
Either of two diving ducks(Bucephala clangula or B. islandica) of northern regions, having a short black bill, a rounded head, and yellow eyes.
鹊鸭一种潜鸭（鹊鸭或冰洲鹊鸭），生活于北方，黑短喙，圆头，黄眼
11.
The mother duck pats him on the head.
母鸭轻拍着他的头。
12.
Any of various diving ducks of the genus Aythya, especially A.ferina of Europe and Asia, which has gray and black plumage and a reddish head.
潜鸭一种潜鸭属潜水鸭，尤指产于欧洲和亚洲的红头潜鸭，它有灰黑色的羽毛和浅红色的头
13.
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
14.
Korea and China are separated by only the Yalu River.
朝鲜和中国只隔一条鸭绿江。
15.
A steel railway bridge spans the Yalu River.
鸭绿江上有一座钢铁大桥。
16.
No, they were not. They were on the other side of the Yalu and Tumen Rivers.
不是，他们是在鸭绿江、图们江那边。
17.
Cooperative Committee of Shipping in Yalu River and Tumen River of China and Korea
中朝鸭绿江、图们江航运合作委员会
18.
Two Strong Historical Earthquakes in Yalujiangkou in 1917 and 1944
1917及1944年鸭绿江口的两次历史强震