英语释义

• unpaired median fin on the backs of fishes and some other aquatic vertebrates that help to maintain balance

片语

First dorsal fin height第一背鳍高度

Dorsal caudal fin margin背鳍至尾鳍缘

dorsal fin fairing背鳍整流罩

second dorsal fin第二背鳍

Dorsal fin vein背鳍静脉

a dorsal fin背鳍

nd Dorsal Fin Base第二背鳍鳍基

Dorsal l fin背鳍

Origin of dorsal fin背鳍起点

英汉例句

• 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.

  在描述鳞片、背鳍条和矢耳石三种材料轮纹特征的基础上，比较了这些年龄鑒定材料在判读错鄂裸鲤年龄和反映生长特征上的异同。

• 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。

• 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。

• 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鑒定。

• that much was clear from the way the whale「s huge six foot dorsal fin had flopped over—a detumescent symbol of its emasculated state.

  这一点是显而易见的，它那六英尺高的背鳍塔拉着--它被阉割了。

• the first dorsal fin is composed of six to nine independent, short, stout , and sharp spines.

  第一次的背鳍由六至九独立、短期、结实，和锐利刺。

• factsheet no. 14 animals from the indian ocean have a hump on the back below the triangular dorsal fin but those from the pacific have an indistinct or absent hump.

  印度洋的 海豚在三角形的背鳍后长有隆肉 ，但太平洋一带的海豚的隆肉则不太明显，甚至完全没有隆肉。

• full pearls below the dorsal fin area cum golden brush on the tail makes this a high grade bukit merah blue brooder.

  高级布奇美拉蓝底过背的背鳍下面盖满小珠鳞及散布金粉的尾部。

• 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。

• 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.

  目击者称看到有鲨鱼背鳍在水面上时隐时现，后来发现海水变成红色，而那名男子也从澳大利来西海岸上消失了。

• 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。

• the humpback has a small dorsal fin 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。

• 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。

• they also have broad flippers, a reduced dorsal fin (a larger one would just get in the way in tight spots), and small eyes—echolocation helps them pinpoint prey in muddy water.

  鳍状前肢宽大，背鳍退化（较大的背鳍在狭窄处会造成阻碍）小眼睛——因为他们可利用回声，精确定位河泥里的猎物。

• the first dorsal fin is black at the front.

  第一个（刺背鳍是在前面的黑。

• it is not unusual to see a striper 's dorsal fin 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。

• we established a kinematic model of the long-based undulatory fin on the basis of analyzing the long-based dorsal fin locomotion and considering the fluid-structure interaction.

  在分析长背鳍运动和流固耦合的基础上，建立了柔性波动长鳍的运动学模型；

• according to the simplified kinematic model, the bionic set of the undulatory dorsal fin has been designed in a three-dimensional cad software.

  根据设计参数和数学建模的结果，设计出柔性长背鳍运动的仿生装置，并在三维cad软件中进行零件建模和虚拟装配；