a shark's dorsal fin
鲨鱼的背鳍
The dorsal fin is spinous.
背鳍有很多刺。
First dorsal fin dusky to black.
第一背鳍暗色到黑色的。
Black Bubble Eyes With Dorsal Fin.
扯旗黑水泡
Dogfishes having a spine in each dorsal fin.
背鳍上各有一刺的角鲨鱼。
A goldfish LanChou belongs to the egg, dorsal fin.
兰畴属于蛋种金鱼，无背鳍。
The shark's dorsal fin was cut offby the fisherman.
鲨鱼的背鳍被渔夫割了下来。
Observation on Spines of Dorsal Fin in Crucian Carp.
鲫鱼背鳍棘的观察
The dorsal fin is ornamented with these two colours.
空气垂直舵由这两色装饰。
The shark's dorsal fin was cut off by the fisherman.
鲨鱼得背鳍被渔夫割了下来。
The second dorsal fin, near the tail, is much smaller.
靠近尾巴处得第二条背鳍要小得多。
RESEARCH ON SWIMMING BY UNDULATORY LONG DORSAL FIN PROPULSION
长背鳍波动推进游动研究
His dorsal fin was down and his huge pectorals were spread wide.
它的脊鳍向下耷拉着，巨大的胸鳍大张着。
Cymbospondylus had no dorsal fin and its tail was long like an eel's.
杯椎鱼龙没有背鳍, 尾部像鳗鱼一样扁长。
Interspinous membrane Skin between the spines of, e. g., the dorsal fin.
棘间膜在棘之间的皮肤, 例如, 背鳍。
Effect of Low Dorsal Fin on Aerodynamic Characteristics of Slender Delta Wing
低背鳍对细长平板三角翼大迎角空气动力的影响
Histological Observation on Scared Soft Rays of Dorsal Fin of Cyprinid Fishes
剪切标志鲤科鱼类背鳍软条的组织学观察
The dorsal fin acts as a keel, giving the dolphin some stability as it swims.
作为龙骨的背鳍, 因为它使一些稳定海豚游泳。
Differentiation of Regenerative Blastema Cells Autografted into the Dorsal Fin
自体移植到背鳍内的再生芽基细胞分化
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。
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
Therefore, no dorsal fin eggs planted in varieties of goldfish are more highly regarded.
因此, 没有背鳍的蛋种在金鱼品种中更受推崇。
Dorsal fin of the fish, the majority of the individual food is difficult to swim properly.
背鳍的鱼类多数个体很难正常游动觅食。
Experimental research on the separation vortices over slender delta wing with low dorsal fin
带背鳍细长平板三角翼脱体涡的实验研究
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
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