The performance of annular flow and heat transfer in horizontal micro fin tubes was analyzed.
对水平微翅管内的环状流流动和换热特性进行了分析。

It can move forward, backward or brake depending on the undulatory motion of the flexible fin.
来实现载体得前进，后退，制动等各种机动动作。

They say the practice of removing the fin and tossing the shark back into the sea is barbaric.
他们说把鱼翅切下后再把鲨鱼扔回海里的做法太野蛮。

Research on Structure Design and Simulation for the Bionic Set Inspired by Undulatory Dorsal Fin
柔性长背鳍波动仿生装置的结构设计与仿真技术研究

Forked caudal fin A caudal fin with a deeply concave or excavated hind margin, such as in tunas.
叉型尾尾鳍有一个深深地凹曲或后缘内凹，例如鲔鱼。

The reason of lower welding qualified rate of high frequency welding spiral fin pipe is analyzed.
分析了高频焊接螺旋翅片管焊接合格率偏低的原因。

Butterfly bettas have the mutant gene that causes variegated fins with a very specific fin pattern.
蝴蝶斗鱼因基因突变拥有色彩斑驳得鳍及特殊得花色。

However, although the biscuits have enough to eat, a bowl of shark fin can come to a better course.
不过，虽然烧饼已经足以果腹，能来碗鱼翅当然更好。

Analyzing and Comparing for Heat Transfer Performance of Oval and Flat Tube Bank Fin Heat Exchangers
椭圆管与扁管管板式换热器换热性能的分析比较

Predorsal length From the base of the anterior most dorsal fin ray to the tip of the snout or upper lip.
背前长从最前面背鳍鳍条基底处到吻尖或上唇前端。

A fin or concave face for holding is arranged at the exterior side surface of the stainless steel casing.
在不锈钢壳体外侧面设用于手持的凸棱或凹面。

The width to width ratio of grid fin was an important parameter influencing the aerodynamics of grid fins.
格宽翼弦比是影响栅格翼气动特性的一个重要几何参数。

How does the arrogant wing turn into the dream fin The bird does not stop in aquatic paces back and forth.
怎么做傲慢翼轮入梦想飞翅鸟在水生步幅不反复停止。

unpaired median fin on the backs of fishes and some other aquatic vertebrates that help to maintain balance.
鱼类和其他水生脊椎动物背部帮助保持平衡的奇鳍。

The fundamental characteristics of the flow about grid fin and the flow mechanism were discussed and analyzed.
还对栅格翼绕流的基本特性以及流动机理作了讨论和分析。

Effect of Dorsal Fin Height on Symmetry and Asymmetry of Vortex Pairs over Delta Wing at High Angles of Attack
背鳍对三角翼大迎角脱体涡的影响

Tube pitch effect on heat transfer local characteristics of flat tube bank fin mounted with vortex generators.
横向管间距对涡强化扁管管片局部传热的影响

The yawing can apparently attenuate the angular displacement of both the tail and the attack angle of tail fin.
艏摇的存在会明显的衰减尾柄主臂和尾鳍攻角的角位移。

Total automation design. Appropriate bottle opening cutting device and bottom fin trimming device are outfitted.
全自动设计，配套完善的自动切瓶口及拉瓶底毛边装置。

boiled shrimp in salty water Spiced Beef soft deepfried fillet sharks fin in casserole seacucumber with eggwhite
盐水虾五香牛肉软炸里脊沙锅鱼翅芙蓉海参

Comparison Study of Thermal Performance of Plate Fin Type Heat Exchangers with Aligned and Staggered Arrangements
顺排与叉排套片式换热器的热力性能对比研究

Old World freshwater catfishes having naked skin and a long anal fin more or less merged with the eellike caudal fin.
东半球的淡水鲇鱼，体表无鳞，有类似鳗鱼尾鳍的很长的臀鳍。

A method has been presented for calculating the aerodynamic characteristics of grid fin in subsonic and supersonic flow.
本文提出了计算栅格翼亚，超音速气动特性的计算方法。

The tail region， Bordered Below by a long anal fin that the fish undulates to move about， contains the electric organs.
鳍的下缘有一长形臀鳍，依靠臀鳍的波动而游动。

Any of several baleen whales of of the family Balaenopteridae having longitudinal grooves on the throat and a small pointed dorsal fin.
几种喉部有纵向沟槽且背鳍小而尖的须鲸科长须鲸。