查询词典 fin

Diagnostic characters for the recognition of species include the presence or absence of pectoral fin, the position of dorsal fin origin, gill opening, anus, nostril opening and eye, the cirri present or not, the dentition type, the body coloration, and th

一般依据胸鳍的有无或发达程度，背鳍起点、鳃孔、肛门、鼻孔和眼等的相对位置，颌的发达程度和颌上是否具须，齿的形状和排列方式，身体的斑纹，以及头部和体侧的侧线孔数目等进行鉴别。

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。

The research achievement provides valuable theory and advanced engineering method for engineering design, manufacture, improve and accident analysis of fin-stabilited sabot-discarded penetrator, and it has higher practical value to improve quality and efficiency of design, and reduce design cost for fin-stabilited sabot-discarded penetrator.

本文研究成果能为尾翼稳定脱壳穿甲弹的设计分析、研制、改型和事故分析提供参考，这种计算分析方法对提高脱壳穿甲弹的设计质量和效率，降低设计成本，有较大的实用价值。

In order to improve the maneuverability of underwater biomimetic fish-like propulsor, we recently study black ghost knifefish which typically uses undulatory locomotion of ventral ribbon fin to produce thrust. The morphology and kinematics of this ribbon fin is analyzed.

为了提高仿鱼型推进器在水中运动的灵活性，选择了典型的依靠腹部绸带状鱼鳍波动运动产生推进力的黑色魔鬼刀鱼进行研究，对此绸带状鱼鳍的形态和运动机理进行了分析，同时对鱼鳍的结构进行简化。

Firstly, this dissertation carries out bionic research on the motion of fish body and caudal fin of Thunmiform swimmers in one-dimensional steady swimming for the purpose of establishing kinematic model of underwater propulsor of Thunmiform. This paper also presents the kinematic parameters which describe the motion of fish body and caudal fin, the fundamental approach to getting the propulsion force and the factors related to the propulsion force and efficiency.

首先，从建立仿鲹科加新月形尾鳍推进模式水下推进器运动学模型的目的出发，对采用鲹科加新月形尾鳍推进模式的鱼类在一维稳态游动情况下的身体以及尾鳍的运动进行了仿生学研究，研究了推进运动的基本特征，给出了身体及尾鳍的运动状态、描述其运动的运动学参数、推进力产生的基本途径以及与推进力和推进效率有关的因素，从而为仿鱼水下推进器运动学建模与仿真提供了仿生学基础。

The typical symptoms of the fulminant hemorrhage tilapia in Hainan are as follows: congestion and hemorrhage in skin and muscle, congestion in the pterygiophore and decay in the end of dorsal fin and caudal fin, congestion and swelling in spleen, enlargement in gallbladder, rubefaction and congestion in liver, congestion and hemorrhage in abdominal wall and intestinal wall.

海南地区暴发的罗非鱼出血症的典型症状为：皮肤和肌肉大面积充血、出血，背鳍和尾鳍鳍条末端腐烂、鳍条充血，肝脏充血发红，脾脏充血、肿大，胆囊肿大，腹腔壁和肠壁都有不同程度的充血或出血。

When the saturated vapor of pure R11 or R113 was condensed on the PF tubes under free convection conditions, the HTCs (based on the outside area of the base tube, the same be1ow) were 14 to 20 times those of the smooth tube because the condensate surface tension made the condensate film on fin surfaces thin and the rough saw-toothed fin surfaces disturbed the boundary layer in the condeneate film.

纯R11、R113的饱和蒸气在大空间花瓣形翅片管上冷凝时，由于凝液的表面张力将翅片表面上的液膜拉薄以及粗糙的锯齿形的翅片表面扰乱了凝液膜内的流动边界层，传热膜系数（以坯管外表面积为基准，下同）是光滑管的14—20倍。

Changes in rheological properties and structure of shark fin s(gel strength,maximum breakage strain,shearing strength and fracture stress) were studied on shark fin s heated for various periods(1h,2h,3h,and 4h)by a texture meter.

研究了鱼翅在不同加热时间(1、2、3、4 h)条件下组织构造及其物性学参数(凝胶强度、最大破断应变、剪切应力、破断强度)变化，并测定了胶原蛋白含量。

Individuals at sea are steel blue to blue-green on the back, silver on the sides, and white on the belly, with large oval spots present on the back, the adipose fin, and on both lobes of the caudal fin.

海上的个人是钢蓝色、蓝色的当前背面，脂肪的鳍和对这两种极限的尾的鳍背银的面上的绿色及上大椭圆形点的肚子白色。

STRUCTURE: Titanium and composites used extensively, with particular emphasis on corrosion resistance; fully articulated three-blade coaxial contrarotatmg rotors have all-composites blades with carbon fibre and glass fibre main spars, pockets (13 per blade) of Kevlar-type material, and filler similar to Nomex; blades have non-symmetrical aerofoil section; each has ground-adjustable tab; each lower blade carries adjustable vibration damper, comprising two dependent weights, on root section, with further vibration dampers in fuselage; tip light on each upper blade; blades fold manually outboard of all control mechanisms, to folded width within track of main landing gear; rotor hub is 50% titaniuin/50% steel; rotor brake standard; all-metal fuselage; composites tailcone; fixed incidence tailplane, elevators, fins and rudders have aluminium alloy structure, composites skins; fins toe inward approximately 25°; fixed leading-edge slat on each fin prevents airflow over fin stalling in crosswinds or at high yaw angles.

结构：钛和复合材料广泛使用，耐腐蚀性能与特别强调，充分阐明三叶片转子同轴contrarotatmg有碳纤维和玻璃纤维的主要棒材全复合材料桨叶，口袋（每刀片13）凯夫拉型材料，类似的Nomex纤维填料；叶片非对称机翼部分，每有地面可调选项卡，每降低叶片振动阻尼器进行调节，包括两部分依赖重根，在机身进一步减振装置；小费每个刀片上轻；刀片倍手动舷外所有控制机制，折叠宽度内的主起落架的轨道；转子中心为50％titaniuin/50％钢；转子制动标准；全金属机身，复合材料tailcone，固定发生机尾，电梯，蛙鞋和方向舵的铝合金结构，复合材料的皮肤；鳍鳍在每个脚趾向内约25 °；固定领先的板式翅片防止了侧风或气流停滞在高偏航角度。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。