1.
Experimental and Numerical Researches on Undulatory Dorsal/Median Fin Propulsion Modes;
背鳍/背臀鳍波动推进机理实验研究及仿真
2.
"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
3.
an anal [dorsal, pectoral, ventral] fin
尾 [背,胸,腹] 鳍
4.
They are quite an accomplishment in betta form.
巨大、下伸展的尾鳍，完美的背鳍及对称的臀鳍，半月斗鱼绝对是斗鱼型态上的一大成就。
5.
large food fish of warm waters worldwide having long anal and dorsal fins that with caudal fin suggest a three-lobed tail.
世界各地温暖水域中的大型食用鱼，背鳍和臀鳍很长象有三个分叶的尾巴。
6.
fish having greatly elongated front rays on dorsal and anal fins.
背鳍和尾鳍上有很细长的触须的鱼。
7.
You can see that upper and lower fin" seems" like a part of the body.
七彩的背鳍和腹鳍看上去是身体的一部分。
8.
A primitive, bony freshwater fish(Amia calva)of central and eastern North America, with a long, spineless dorsal fin.
弓鳍鱼北美洲中部和东部的一种原始、多骨的淡水鱼（弓鳍鱼弓鳍鱼属），具有长的无脊的背鳍
9.
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。
10.
dogfishes having a spine in each dorsal fin.
背鳍上各有一刺的角鲨鱼。
11.
small smooth-skinned sharks lacking spines on dorsal fins.
背鳍上无刺表皮光滑的小型鲨鱼。
12.
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。
13.
The upper and lower fins don't cover the tail or leave a big gap before the tail.
背鳍和腹鳍不包含鱼的尾巴，或者说，和尾巴离开一个很大的空隙。
14.
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。
15.
any of several marine reptiles of the Mesozoic having a body like a porpoise with dorsal and tail fins and paddle-shaped limbs.
中生代的几种水生爬行动物，身体象海豚，有背鳍和尾鳍，四肢形如浆。
16.
small elongate fishes of shallow northern seas; a long dorsal fin consists entirely of spines.
北部海洋浅水中细长的小鱼；完全由刺组成背鳍。
17.
large pelagic game fish having an elongated upper jaw and long sail-like dorsal fin.
大型远洋食用鱼，有细长的上颌和帆状的长背鳍。
18.
heavy-bodied reptile with a dorsal sail or crest; of the late Paleozoic.
有背鳍和头冠、体重的爬行动物；产于晚古生代。