查询词典 fin

Or at least any distinct digits in its pectoral fin. But tetrapods, which evolved from fish, did.

但是从鱼类进化来的四足动物却有这种结构。

In a second paper in the journal, the scientists describe in depth how the pectoral fin of the fish serves as the origin of the tetrapod limb.

在第二篇文章中，科学家详细描述鱼的胸鳍如何担当tetrapod肢体的起源。

Any of various widely distributed marine fishes of the family Triglidae,having large fanlike pectoral fin s and a large armored head.

鲂？一种分布广泛的鲂？科海鱼，有扇状的胸鳍，头部大而有甲

For the sake of raising the under water propulsion properties of Robo-Mackerel, An analytical discussion was made on the relationships of each dynamics parameters of the swinging of mechanical pectoral fin and the above stated targets, and the optimal value of each dynamics parameters were proposed.

为有效地提高Rob-Mackerel的水下推进性能，分析讨论了机械胸鳍摆动各运动学参数和上述指标的关系，并提出各运动学参数的最优值。

This findings are the first to provide in vivo evidences for IGFBP-3 playing an important role in regulating development and growth of pharyngeal cartilage and otic vesicle, differentiations of optic and motor neuron, as well as its involving in the development of eye, pineal gland and pectoral fin bud in zebrafish.

这些新的发现，首次提供在体证据证明 IGFBP-3 在调节斑马鱼咽弓、内耳的生长发育、视神经和运动神经的分化过程中起着重要作用，并参与调节眼睛、松果腺、胸鳍的发育过程。

A small croaker of North American Atlantic waters, having a dark mark above each pectoral fin and valued as a food and sport fish.

斑头鸽一种产于北美洲大西洋水域的喙上方有一斑点的鸟，胸鳍上带有黑色斑纹，可作肉用或训练捕鱼

The characters could be defined as 12 combined types based on that on the sides of the head and pectoral fin. The secondary sexual characters are of diversity, and might vary among different species or within same species from different river system or even from the same rivers.

高原鳅的雄性第2性征具有多样性，不同种类的雄性第2性征可能存在差异，分布在不同或相同水系的同一种类的个体间雄性第2性征也可能发生变化。

Any of various bottom - dwelling fishes of the family Antennariidae of tropical and temperate seas,characteristically having a prickly or warty globose body and pectoral fin s adapted for grasping.

鱼热带或温带海域中属？鱼科的海底鱼类，特点是有带刺或多疣的球形身体，善长用胸鳍捕食

Pl. spot or spots A small croaker of North American Atlantic waters, having a dark mark above each pectoral fin and valued as a food and sport fish.

spot 或 spots 斑头鸽：一种产于北美洲大西洋水域的喙上方有一斑点的鸟，胸鳍上带有黑色斑纹，可作肉用或训练捕鱼

In order to make the biomimetic robotic fish control its motion and posture with sensory information autonomously,an artificial central pattern generatorcontroller consisting of four neural oscillators with sensory information feedback is designed in this paper~ This controller can generate rhythm instructions to drive two pectoral fins and a tail fin flapping repeatedly.

采用的控制模型由4个振荡器构成，可根据反馈的信息产生节律信号以控制机器鱼胸鳍和尾鳍的运动。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐