英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：

aves    
n. 鸟类

鸟类

Aves
n 1: (ornithology) the class of birds [synonym: {Aves}, {class
Aves}]

Aves \A"ves\, n. pl. [L., pl. of avis bird.] (Zool.)
The class of Vertebrata that includes the birds.
[1913 Webster]

Note: Aves, or birds, have a complete double circulation,
oviparous reproduction, front limbs peculiarly modified
as wings; and they bear feathers. All existing birds
have a horny beak, without teeth; but some Mesozoic
fossil birds (Odontornithes) had conical teeth inserted
in both jaws. The principal groups are: {Carinat[ae]},
including all existing flying birds; {Ratit[ae]},
including the ostrich and allies, the apteryx, and the
extinct moas; {Odontornithes}, or fossil birds with
teeth.
[1913 Webster]

Note: The ordinary birds are classified largely by the
structure of the beak and feet, which are in direct
relation to their habits. See {Beak}, {Bird},
{Odontonithes}.
[1913 Webster]


请选择你想看的字典辞典：
单词字典翻译
Aves查看　Aves　在百度字典中的解释百度英翻中〔查看〕
Aves查看　Aves　在Google字典中的解释Google英翻中〔查看〕
Aves查看　Aves　在Yahoo字典中的解释Yahoo英翻中〔查看〕

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Bird - Wikipedia
    Birds are a group of warm-blooded theropod dinosaurs constituting the class Aves, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton
  • Bird - Aves, Species, Orders | Britannica
    Bird - Aves, Species, Orders: In classifying birds, most systematists have historically relied upon structural characteristics to infer evolutionary relationships
  • Birds or Class Aves - Description and Characteristics
    Learn about birds or class Aves Discover what a bird is, its characteristics, and its relationship to mammals and dinosaurs
  • Aves - Definition and Examples - Biology Online Dictionary
    Aves is a class of warm-blooded vertebrates that includes birds They have wings modified from their forelimbs and developed flying muscles
  • Bird Animal Facts - Aves - A-Z Animals
    Birds (Class Aves) are endothermic, feathered vertebrates characterized by beaks without teeth, egg-laying reproduction with hard-shelled eggs, and (in most species) the ability to fly They occupy nearly all terrestrial and many aquatic habitats worldwide
  • Birds of the World - Cornell Lab of Ornithology
    Comprehensive life histories for all bird species and families Unlock species accounts, maps, multimedia, and bird family overviews For public and academic libraries, government agencies, consulting firms, nature centers, nonprofits, and more
  • What Are Aves? Defining the Class of Birds - Biology Insights
    Aves, commonly known as birds, represent a distinct and diverse class of warm-blooded vertebrates They are characterized by unique features and thrive across nearly every environment on Earth
  • Introduction to the Aves
    The vertebrate class Aves includes the birds, an extremely distinctive and successful clade, with an estimated 9000 species worldwide, including the snowy owl pictured here
  • Aves (birds) | INFORMATION | Animal Diversity Web - ADW
    Birds are vertebrates with feathers, modified for flight and for active metabolism Birds are a monophyletic lineage, evolved once from a common ancestor, and all birds are related through that common origin There are a few kinds of birds that don't fly, but their ancestors did, and these birds have secondarily lost the ability to fly
  • Aves - Animalia
    Birds are a group of warm-blooded vertebrates constituting the class Aves, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton





中文字典-英文字典  2005-2009