unpaired median fin on the backs of fishes and some other aquatic vertebrates that help to maintain balance
双语例句
1. The first dorsal fin is black at the front.
第一个（刺背鳍是在前面的黑。
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2. The shark's dorsal fin was cut off by the fisherman.
鲨鱼的背鳍被渔夫割了下来。
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3. Its sail-like first dorsalfin provides stability while swimming.
帆状的第一背鳍在游动时提供了稳定性。
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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。
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5. His dorsalfin 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。
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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。
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7. Now he speeded up as he smelled the fresher scent and his blue dorsalfin 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。
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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。
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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。
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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。
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11. It is not unusual to see a striper 's dorsalfin whizzing past you while casting in knee deep water.
这不是不寻常的看到一个变色的背鳍驰驱，过去你而铸造的膝盖深的水。
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12. The most important part of our scientific observation was to see whether they had nicks on their dorsalfin.
我们要做的科学观察最重要的部分是看看在他们的背鳍上是否有小疤痕。
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13. The humpback has a small dorsalfin located towards the tail flukes about two-thirds of the way down its back.
驼背鲸有一个较小的背鳍，大约是背部三分之二接近尾部的中央。
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14. 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。
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15. Perch: snub-nosed bony freshwater fish with an oval body and a spiny dorsalfin; the flesh of this fish is highly valued.
鲈鱼：塌鼻子、食肉性淡水硬骨鱼类，椭圆形的身体、多刺的背鳍；肉质美味。
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16. 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。
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17. The dorsalfin coloration of the male is a circular red spot ringed with blue which scientists said reminded them of Obama's campaign logo.
这条雄性的鱼，背鳍是蓝色，上面带着红色圆形点，科学家们表示会联想到奥巴马的竞选标志。
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18. The ages of S. yunnanensis can be identified through the characteristics of the annual rings of the scales, otoliths and dorsal fin spines.
云南倒刺鲃的年龄可以通过鳞片、耳石、背鳍条上的年轮特征来鉴定。
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19. Witnesses reported seeing a dorsal fin and thrashing in the water before the sea turned red and the man vanished at the scene on Australia's west coast.
20. They also have broad flippers, a reduced dorsalfin (a larger one would just get in the way in tight spots), and small eyes—echolocation helps them pinpoint prey in muddy water.
21. This condition, called neoteny, means it keeps its tadpole-like dorsalfin, which runs almost the length of its body, and its feathery external gills, which protrude from the back of its wide head.
22. This paper deals with the numerical solution of the Euler equation for airfoils using approximate boundary conditions and the effects dorsalfin on vortex over delta wing at high angles of attack.
23. The characteristics of three kinds of age determination materials, otoliths scales and dorsal fin spines from Gymnocypris cuoensis had been described and compared in their using in age determination.
24. The characteristics of three kinds of age determination materials, otoliths scales and dorsal fin spines from Gymnocypris cuoensis had been described and compared in their using in age determination.
