查询词典 pectoral fin

There are 8-9 spines and 7-8 soft rays in anal fin, and 7-8 soft rays in the pectoral fin.

肛门的肋片和在胸鳍 7-8 软线有 8-9 刺和 7-8 软照射。

The measurements used are fork length, head length, upper jaw length, snout length, length of dorsal fin base and anal fin base and the distances from the tip of snout to insertion of dorsal fin, to pectoral fin, to ventral fin and to hard margin of preopercle.

此所用於分析之外部非体节形质计有：尾叉长、头长、上颚长、吻长、眼径、背鳍基底长、臀鳍基底长以及吻端到前鳃盖骨后绿、背鳍起点、腹鳍起点、臀鳍起点等11个形质。

The deformation always appears near the points of the origin of pectoral fin or the origin of dorsal fin to the posterior margin of caudal fin, and is mostly accompanied by flaccidity of caudal fin end.

畸形弯曲位置主要发生在近胸鳍起点处以及背鳍起点至尾鳍末端之间，多伴有尾鳍末端下垂。

In the second part the pectoral fin motion model of 2 degrees and 3 degrees of freedom is constructed. Also we use Unsteady Vortex Lattice Method to analyze the hydrodynamic performance of the pectoral fin motion.

第二部分建立刚性胸鳍二自由度、三自由度的运动模型，并用非定常涡格法计算和分析了胸鳍的水动力性能。

Its flat tail fin to be divided into two forks, on both sides of the pectoral fin was like the palm of your hand flat, triangular dorsal fin.

它的尾鳍扁平地分为两叉，两边的胸鳍呈扁平的手掌状，背鳍呈三角形。

Dorsal fin, tail fin and fat fins slightly yellow, pectoral fin, and ventral fin Tunqi gray.

背鳍、脂鳍和尾鳍稍带浅黄色，胸鳍、腹鳍和臀鳍灰白色。

His paper established the physics model for the newly developed under water bio-robot Robo-Mackerel moving about under the pattern of the swinging of its pectoral fin, and the motion equation of the swinging of mechanical pectoral fin was presented.

对新近研制的仿生水下机器人Robo-Mackerel，建立其在胸鳍摆动模式下游动的物理模型，并给出机械胸鳍摆动的运动方程。

This paper takes the small fish of Carangiform as the mimetic object. Through the bionics study to the principle of Carangiform"s propulsion, the robofish"s main body mechanism that has two degrees of freedom tail fin and single degree of freedom pectoral fin has designed. At the same time, the parameterized mathematical model of double-hinged propulsion system has established. The kinematics analysis, dynamics analysis to the propulsion process and preliminary hydrodynamics analysis to the tail fin and the pectoral fin have been completed. The dynamic equations to the propulsion system have been established.

本文以鲹科模式鱼类为仿生对象，通过对鲹科模式鱼类游动机理的仿生学研究，设计了两自由度的尾鳍推进机构及单自由度的胸鳍机构的机器鱼机械本体结构，建立了参数化的两关节尾鳍推进模式的数学模型，并对推进过程进行了运动学、动力学分析，建立了推进系统动力学方程，对尾鳍和胸鳍推进的水动力进行了初步分析。

Two-winged species have only the pectoral fin s enlarged; four-winged species have both the pectoral and the pelvic fin s enlarged.

有些种类具双翼而仅胸鳍较大，有些则有四翼，胸、腹鳍皆大。

Long and thin mouth, back Light gray or blue, pure white for the ventral, dorsal fin-shaped as a triangle, two pectoral fin like the palm of your hand, flat tail fin in the middle fork, good at swimming, the maximum speed of 80 km around .

嘴部又长又细，背呈浅灰色或蓝色，腹面为纯白色，背鳍形如一个小三角，胸鳍宛如两只手掌，尾鳍扁平，中间分叉，善于游水，时速可达80千米左右。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。