查询词典 pterosaurs

The primitive characteristics include long tail with more than 20 caudal vertebrae, which are surrounded by thin rod-like extensions of the zygapophyses and chevrons, and the fifth toe bearing two long digits, whereas the derived characteristics include an elongated skull with antorbital and nasal openings fused into a large nasoantorbital fenestra, long cervical vertebrae with reduced or absent cervical ribs. The length ratio of the wing metacarpal to the humerus is between the basal pterosaurs and pterodactyloids.

它既具有原始类群的特征：比如尾长，多于20节尾椎椎体，且尾椎椎体由极度加长的、纤细的前后关节突及脉弧所包裹，构成一僵硬的尾部，第五脚趾具有两个长的趾节；又具有进步类群的特征：比如头骨加长，鼻孔和眶前孔愈合为一大的鼻眶前孔，颈椎椎体长，没有或者颈肋退化；翼掌骨与肱骨的比率介于原始类群和进步类群之间。

In pterosaurs a greatly elongated fourth finger of each forelimb supported a wing-like membrane.

在翼龙大大拉长第四手指每个前肢支持翼状膜。

Unable to fly or walk, Hesperornis needed to be wary of predators: sharks and plesiosaurs at sea, dinosaurs and pterosaurs on land.

由于不能飞也不能步行，黄昏鸟需要警惕掠食者们：水中有鲨鱼和蛇颈龙，岸上有恐龙和翼龙。

The main premise of the series seems to be that various animals from the past - including a pareiasaur, a gorgonopsian, dodos, a mosasaur, pterosaurs and some giant arthropods - wander through the portal and get into various japes and scrapes in the present.

主体的前提下一连串似乎是说各种动物，从过去-包括p areiasaur， g orgonopsian， d odos，恐龙，翼龙和一些巨型节肢动物-徜徉通过门户网站，可以进入各雅佩斯和旅游观光于现在。

In terms of the fundamental restructuring of the pterosaur bauplan, the high diversity of food sources from the air (such as feathered dinosaurs, gliding mammals, small pterosaurs and insects) might have been one of the causes responsible for the first evolution of the skull and neck.

从达尔文翼龙的骨骼结构变化上看，空中丰富的食物来源(比如飞行能力差的、带羽毛的恐龙、滑翔的哺乳动物、小的翼龙及昆虫等)，可能为导致翼龙头骨和颈部首先演化的原因之一。

The most astonishing etchings, however, clearly represent dinosaurs - brontosaurs, triceratops, stegosaurus and pterosaurs.

然而最惊人的雕刻很清楚的刻了雷龙，三角恐龙，剑龙和翼龙。

A large subclass of diapsid reptiles including: crocodiles; alligators; dinosaurs; pterosaurs; plesiosaurs; ichthyosaurs; thecodonts.

双窝类爬行动物的一个大的亚纲；包含鳄鱼；短吻鳄；恐龙；翼龙；蛇颈龙；鱼龙；槽齿类。

In pterosaurs a greatly elongated fourth finger of each forelimb supported a winglike membrane. The other fingers were short and reptilian, with sharpclaws.

翼龙每个前肢的大大延长的第四指支撑一个翅膀状的薄膜，其它指头小，而且是典型的爬行动物式，有尖爪。

It has great implications for the study of the origin and evolution of pterosaurs.

这对研究翼龙的起源和演化有重要意义。

There were two kinds of pterosaurs, ones with and others without tails.

世界上有两中翼龙，一种有尾巴，另一种没有。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。