The pancreas lobes and ducts were studied in 39 wild ducks——Aythya ferina in China.
本实验用大体解剖学方法,观察了39只红头潜鸭(Aythya ferina)胰叶和胰管的形态结构。
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
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
North American diving duck with a gray-and-black body and reddish-brown head.
北美洲的潜鸭，灰黑色身体和红褐色头。
heavy-bodied Old World diving duck having a gray-and-black body and reddish head.
东半球身体笨重的潜鸭，灰黑色羽毛和浅红色的头。
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
large-headed swift-flying diving duck of arctic regions.
北极地区大头、飞行敏捷的潜水鸭。
A small North American diving duck(Bucephala albeola) having black and white plumage and a densely feathered, rounded head.
巨头鹊鸭一种体型小的北美潜水鸭（巨头鹊鸭），有黑白色的羽毛和稠密的毛，圆脑袋
North American goldeneye diving duck.
北美洲鹊鸭科潜水鸭。
Any of various birds, such as the scaup, with dark head markings.
黑头鸟一种以头部呈黑色为特征的鸟，如斑背潜鸭
an undomesticated duck (especially a mallard).
非家养的鸭，特指绿头鸭。
The otter slips beneath the water, comes up beneath the ducks, grabs one and returns underwater.
只见水獭滑到水中，潜到鸭群的下方，冷不丁探头抓住一只，立刻又潜到水下去了
diving ducks of North America having a bluish-gray bill.
蓝灰色嘴的北美洲潜鸭。
any of various large diving ducks found along the seacoast: eider; scoter; merganser.
在海岸活动的各种大型潜水鸭；绒鸭；海番鸭；秋沙鸭。
And when the skin turns crisp and golden brown, the duck is done.
等鸭皮发脆、呈暗红色时，鸭子就烤成了。
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
The mother duck pats him on the head.
母鸭轻拍着他的头。
mergansers and closely related diving birds.
秋沙鸭及与其关系较近的潜水鸟。
large black diving duck of northern parts of the northern hemisphere.
北半球北部地区的大型黑色潜水鸭。
