帆状的第一背鳍在游动时提供了稳定性。
Its sail-like first dorsal fin provides stability while swimming.
雷珠阿测量队于2005年开始测量，他们用网捕获14头独角鲸，在其背鳍装上电子传感器。
Laidre's team began taking measurements in 2005, by capturing 14 narwhals (Monodon monoceros) in nets and attaching the electronic gear to the animals' dorsal fins.
这种古老的爬行动物背上有着标志性的船帆状背鳍，它常常会被误认为是一种恐龙，甚至出现在恐龙玩具中。
This reptile, with its iconic sail-shaped back, is often mistakenly identified as a dinosaur, and is even included in packages of toy dinosaurs.
一开始，人们猜想这一背鳍是用来进行体温调节的。借助它，动物可以克服外界剧烈的温变而保持体温稳定。
It was originally suggested that the fin was used for thermoregulation — self-regulation of body temperature — even when outside temperatures may vary drastically.
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。
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.
细长的大型海生无鳞鱼，有尖牙和船帆形的长背鳍。
Large elongate scale less oceanic fishes with sharp teeth and a long sail-like dorsal fin.
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。
The ages of S. yunnanensis can be identified through the characteristics of the annual rings of the scales, otoliths and dorsal fin spines.
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。
The most important part of our scientific observation was to see whether they had nicks on their 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。
Any of several whales of the family Balaenidae, characterized by a large head, whalebone plates in the mouth, and absence of a dorsal fin.
在成千上百的孔雀鱼品种中，雄鱼最著名的特色就是它们华丽的背鳍和尾鳍。
Among the hundreds of guppy varieties, the best known feature of the male fish is its gorgeous dorsal and caudal fins.
神仙鱼的体型既高又扁，有着向后舒展的长长背鳍和臀鳍，常以虾、蠕虫等为食，体长可达12厘米。
The Angel Fish has an elongated and flat shape with long dorsal and anal fins extending backwards. It usually feeds on shrimps and worms and can measure up to 12 cm long.
这是我吃过的最好吃的鱼，不过，我也得到了一个惨痛的教训，鳜鱼的背鳍有毒，被它扎伤，会非常疼。
It was the most delicious fish I think I've ever eaten, although I learned the hard way that the guiyu's dorsal spines contain a poison which can inflict a painful wound if you are stuck by them.
至于这个显眼的背鳍的作用是什么，自从1878年古生物学家爱德华·库珀(EdwardCope)在德州首次发现以来，专家们一直争论不休。
The purpose of the prominent fin that defines this species has been debated since it was first discovered by paleontologist Edward Cope in Texas in 1878.
至于这个显眼的背鳍的作用是什么，自从1878年古生物学家爱德华·库珀(EdwardCope)在德州首次发现以来，专家们一直争论不休。
The purpose of the prominent fin that defines this species has been debated since it was first discovered by paleontologist Edward Cope in Texas in 1878.
应用推荐