1.
the dorsal fin is the vertical fin on the back of a fish and certain marine mammals.
背鳍就是在鱼或者某些海洋哺乳动物背上的垂直鳍。
2.
black-and-white drumfish with an erect elongated dorsal fin.
长有细长直立背鳍身体花白的石首鱼。
3.
voracious snakelike marine or freshwater fishes with smooth slimy usually scaleless skin and having a continuous vertical fin but no ventral fins.
任一种蛇形的淡水鱼，体表光滑无鳞，有连续的垂直背鳍，缺少腹鳍。
4.
Caudal edges have to be straight or curving outwards, and not bending inwards.
尾鳍边缘一定要直或是向外弯曲，不能向内弯折。
5.
You suck on fish heads and fish fins.
你吃鱼时会吸鱼头和鱼鳍(他们都是直接切掉的)。
6.
large edible rays having a long snout and thick tail with pectoral fins continuous with the head; swim by undulating the edges of the pectoral fins.
大型可食用鳐，长有长鼻子、粗尾巴和一直连到头部的胸鳍；靠有波状边缘的胸鳍游动。
7.
frogfishes; tropical spiny-finned marine fishes having large nearly vertical mouths; related to toadfishes and anglers.
躄鱼；热带刺鳍海洋鱼类，嘴较大，且近乎垂直；与蟾鱼有关。
8.
Research on Simulation of Fin Stabilizers Electrical Servo System Based on Direct Torque Control;
基于直接转矩控制的减摇鳍电伺服系统仿真研究
9.
They have body fins and tail fins.
他们有身体鳍和尾巴鳍，
10.
an anal [dorsal, pectoral, ventral] fin
尾 [背,胸,腹] 鳍
11.
New technique for adjustment at zero position of fin-angle of shaking-reducing fin in the fin case
鳍箱内减摇鳍鳍角零位调整的新工艺
12.
For example, they divided the design of a fish into head, body and fins, alternating straight lines with curves, triangles and circles.
他们把一条鱼的侧面分割为鱼头、鱼身、鱼鳍几部分，用直线、孤线、三角形和圆圈等来表现，
13.
They came in a pack and he could only see the lines in the water that their fins made and their phosphorescence as they threw themselves on the fish.
它们是成群袭来的，朝那鱼直扑，他只看见它们的鳍在水面上划出的一道道线，还有它们的磷光。
14.
any of numerous compressed deep-bodied tropical fishes with sandpapery skin and erectile spines in the first dorsal fin.
多种身体扁平细长的热带鱼，皮肤粗糙如砂纸，前部的背鳍可直立如硬刺。
15.
Another new detail is on the turning vanes, which now feature a triangular, vertical fin (2).
另一项新细节在导流翼上，现在这片小翼变成一个三角形且垂直的鳍（2）。
16.
Watch some fish @flying@ through the water.
看鳍刺“飞”过水面。
17.
"It has one dorsal and one anal fin, Both long and Both connected to the rounded tail. "
背鳍和臀鳍各一,形长,均与尾鳍基部相连,尾鳍圆形
18.
a teleost fish with fins that are supported by sharp inflexible rays.
硬骨鱼，鳍由尖而硬的鳍刺支撑。