This kind of identifications demands a great deal of training and practice experiences, at the same time, the people who examines downs, must know well about the characteristics of goose down , duck’s down, c.
这种鉴定需要大量的训练和实践经验,检测人员必须对水禽毛中鹅绒、鸭绒,陆禽毛中的鸡毛、鸽子毛等的形态特征有一个充分的了解。
The present article is aimed at studying the change of eco-environment, or the habitat of the wild duck in Weihe River Valley, Shaanxi Province.
通过渭河咸阳段气候、水质、水域面积、植物等环境因素的改变对野鸭数量分布影响的调查 ,表明环境的恶化导致了动物的生存受到威胁 ,数量减少 ,分布区域缩小。
Amplified fragment length polymorphic technique was used to estimate the genomic DNA polymorphism among eight species of domestic ducks and two species of wild duck.
利用AFLP技术分析我国8种常见家鸭和2种野鸭基因组DNA的多态性,在选取的17对引物中,有9对能得到重复性好的多态性扩增条带。
Study on the Changes of Calcium, Phosphorus and Potassium Contents in Mallard Eggshell at Different Hatching Phases;
野鸭不同孵化阶段蛋壳内钙·磷·钾含量的变化研究
Analysis on meat production and quality of main mallard breeds in Zhejiang province;
浙江省主要野鸭品种(系)生产性能及肉质性状比较分析
A study on the hunting quantities of wild ducks was carried out in Hong Hu lake,Hubei province, during the peried of winter from 1981 to 1990.
1981～1990年冬季调查了洪湖野鸭捕获量，捕获的野鸭有12种，其中种群相对密度大幅下降的有7种，占种数58。
printed down-proof cotton cloth duck down quilt
印花防绒棉布鸭绒被
filling machine for eiderdowns and mattresses
鸭绒被褥和床垫填充机
Any of several large sea ducks, especially of the genus Somateria of northern regions, having soft, commercially valuable down and predominantly black and white plumage in the male.
绒鸭一种大海鸭，尤指北部地区的欧绒鸭属，有柔软的有商业价值的鸭绒，雄鸭毛主要为黑白色
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。
It was like being smothered by a feather bed.
这好象蒙了一床鸭绒被，捂得令人窒息。
Eiderdown Bedclothes, good in quality and light in weight, have good warmth retention property.
鸭绒被褥，质好量轻，保暖性好。
The bedding consists of a bedspread, a duvet, a linen sheet, a mattress and one or two pillows.
床上用品一般有床罩、鸭绒被、亚麻布床单、床垫和一或两个枕头。
A mountaineer is usually equipped with alpine jacket wind-proof garment, down jacket and climbing kit.
登山运动员一般得备有登山上衣，防风衣、鸭绒衣和登山工具。
mixed plain satinplaited duck dedown feather cushion
素缎褶裥鸭低毛绒靠垫
mixed plain satin embroidery duck dedown feather pillo
素软缎绣花鸭低毛绒枕
The down of the eider duck, used as stuffing for quilts and pillows.
羽绒绒鸭毛，用作被子和枕头的芯子
A quilt stuffed with the down of the eider duck.
羽绒被用绒鸭毛做芯子的被
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。
square mixed plain satin plaited duck feather cushion
方型素缎褶裥鸭低毛绒靠垫
An old duck visits the mother duck.
一只老鸭前来造访母鸭。
The duck is short. The duck is short.
鸭子很矮。鸭子很矮。
North American goldeneye diving duck.
北美洲鹊鸭科潜水鸭。
an undomesticated duck (especially a mallard).
非家养的鸭，特指绿头鸭。