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罗纹鸭
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  “罗纹鸭”译为未确定词的双语例句
     were the preponderant species.
     豆雁、绿翅鸭、罗纹鸭等为优势种。
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     E,D+ducks. \;
     E,D+
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     Virus Hepatitis of Ducks
     肝炎
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     were the preponderant species.
     豆雁、绿翅罗纹等为优势种。
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     Dimensional Properties of Various Rib Fabrics
     各种罗纹针织物的尺寸特性
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     A Tentative Inquiry into the Machine Debugging for Knitting French Rib
     法国罗纹的调试浅探
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The ecological habits of the wild goose and duck in Hasuhai lake were studied.According to the results of investigation,there are 20 species of the wild goose and duck which belongs to eight genera. These birds can be divided as 17 species of passing bird and 3 species of migratory bird. They move in in March and move out in November and there is a long time between moving out in Spring and moving in in Autumn.There are 5 species of birds such as Anas acuta to pass through only in Spring.and there are 14 species...

The ecological habits of the wild goose and duck in Hasuhai lake were studied.According to the results of investigation,there are 20 species of the wild goose and duck which belongs to eight genera. These birds can be divided as 17 species of passing bird and 3 species of migratory bird. They move in in March and move out in November and there is a long time between moving out in Spring and moving in in Autumn.There are 5 species of birds such as Anas acuta to pass through only in Spring.and there are 14 species of birds such as Anas strepera to pass through both in Spring and Autumn.Cygnus is the only one species of birds who pass through in Autumn.However,there are 9 species of birds such as Anas platyrhynchos have no changes in quantities.

调查了哈素海雁鸭类的生态习性.结果表明,哈素海雁鸭类共计8属20种,其中旅鸟17种,夏候鸟3种;春季迁来和秋季迁离时间集中在3月中下旬和11月中旬,春季迁来和秋季迁离持续时间较长;春季路过但秋季不路过哈素海的物种有针尾鸭等5种,春季和秋季均路过的物种有赤膀鸭等14种,秋季路过的只有大天鹅1种;春季种群数量明显多于秋季的物种有罗纹鸭等5种,但绿头鸭等9种的种群数量变动不明显,基本保持稳定.

Surveys in West Dongting Lake from July 2003 to June 2005 recorded 198 species of birds.These birds belonged to 39 families,11 orders,of which migrants accounted for 67.7%.The birds of Passeriformes and Ciconiiformes were the dominant species and they comprised 40.9% and 32.8% of the species of the community respectively.Among apiece families,the species of Anatidae is the most.Anser fabalis,Anas crecca,A.falcate et al.were the preponderant species.Four of the species recorded in West Dongting Lake were national...

Surveys in West Dongting Lake from July 2003 to June 2005 recorded 198 species of birds.These birds belonged to 39 families,11 orders,of which migrants accounted for 67.7%.The birds of Passeriformes and Ciconiiformes were the dominant species and they comprised 40.9% and 32.8% of the species of the community respectively.Among apiece families,the species of Anatidae is the most.Anser fabalis,Anas crecca,A.falcate et al.were the preponderant species.Four of the species recorded in West Dongting Lake were national first-grade protected wildlife,including Grus leucogeranus,Haliaeetus albicilla,Ciconia nigra,C.boyciana.Twenty one of the recorded species were national second-grade protected wildlife,including Cygnus cygnus et al. The annual dynamic of individuals,species and species diversity were analyzed by using the Shannon-Wiener index.In the mass,both the dynamic of individuals and species were resemble,because of the influence of migrants,seasonal fluctuation obviously.But the dynamic of species diversity was different.

2003年7月~2005年6月,按月对西洞庭湖的鸟类资源进行调查,共记录到鸟类198种,分属11目39科。其中雀形目和鹳形目占有绝对优势,分别占鸟类群落组成的40.9%和32.8%。各科中,鸭科种类最多,有26种。候鸟134种,占总数的67.7%。豆雁、绿翅鸭、罗纹鸭等为优势种。记录到包括白鹤、白尾海雕、黑鹳、东方白鹳等4种属国家Ⅰ级重点保护物种和大天鹅等21种国家Ⅱ级重点保护物种。对各季度的个体数、物种数和物种多样性指数进行年动态分析表明,个体数和物种数的年动态总体上相似,因受候鸟的影响,季节性明显,物种多样性指数年动态则存在差异。

 
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