全部

1·The first dorsal fin is black at the front.

第一个（刺背鳍是在前面的黑。

2·The shark's dorsal fin was cut off by the fisherman.

鲨鱼的背鳍被渔夫割了下来。

3·Its sail-like first dorsal fin provides stability while swimming.

帆状的第一背鳍在游动时提供了稳定性。

4·Its dorsal fin was in front of me. I was screaming for help.

它的背鳍就在我的前面，我尖声呼救。

5·His dorsal fin was down and his huge pectorals were spread wide.

它的脊鳍朝下耷拉着，巨大的胸鳍大张着。

6·We know this because we can distinguish the male by their large dorsal fin .

我们能知道是因为可由大背鳍区别为雄性。

7·Now he speeded up as he smelled the fresher scent and his blue dorsal fin cut the water.

它闻到了这新鲜的血腥气，此刻正加快了速度，蓝色的脊鳍划破了水面。

8·Large elongate scale less oceanic fishes with sharp teeth and a long sail-like dorsal fin.

细长的大型海生无鳞鱼，有尖牙和船帆形的长背鳍。

9·Dorsal fin, tail fin and fat fins slightly yellow, pectoral fin, and ventral fin Tunqi gray.

背鳍、脂鳍和尾鳍稍带浅黄色，胸鳍、腹鳍和臀鳍灰白色。

10·A small North American freshwater fish (Stizostidion canadense) having a spotted, spiny dorsal fin.

一种产于北美的小型淡水鱼（鰤鲈） ，长有带斑点的刺状脊鳍。

背鳍

1·They are cobalt-blue on top and silvery-white below, with a pronounced dorsal fin and a long, lethal, spear-shaped upper jaw.

它的顶部是钴蓝色，下面和银白色；有着明显的背鳍，还有着长长的、能致命的矛状上颚。

2·The first dorsal fin is black at the front.

第一个（刺背鳍是在前面的黑。

3·We know this because we can distinguish the male by their large dorsal fin .

我们能知道是因为可由大背鳍区别为雄性。

4·Its dorsal fin was in front of me. I was screaming for help.

它的背鳍就在我的前面，我尖声呼救。

5·Any of several whales of the family Balaenidae, characterized by a large head, whalebone plates in the mouth, and absence of a dorsal fin.

露脊鲸：露脊鲸科中的几种鲸，特征为头部硕大、嘴边长有鲸须而无背鳍。