背鳍

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。

The production model included modified engine nacelles, twin main landing gear and a dorsal fin.

生产模式，包括改良发动机舱，双主起落架和背鳍。

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。

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

它的背鳍下垂，庞大的胸鳍向外展开着。

They were not the ordinary pyramid-shaped teeth of most sharks.

它就在水面下用如刀似的背鳍迅速利落地划开水面。

This paper deals with the numerical solution of the Euler equation for airfoils using approximate boundary conditions and the effects dorsal fin on vortex over delta wing at high angles of attack.

本文研究了Euler方程的高效数值方法及背鳍对三角翼大迎角脱体涡的影响问题。

Large deep-water shark with white-tipped dorsal fin; worldwide distribution; most dangerous shark .

生活在深海长有白色背鳍的大鲨鱼；分布于世界各地；最危险的鲨鱼。

Predatory black-and-white toothed whale with large dorsal fin; common in cold seas.

黑白色食肉型有牙齿和大型背鳍的鲸；常见于寒冷的海水中。

I hauled up two fish which I kept: a plump yellow fish spotted in green with a thin dorsal fin and an overbite and a puny blue torpedo-shaped guy with a Chinese junk sail of a top fin.

我抓到两条鱼并把它们拖了上来：一条胖胖的有黄色斑点的黄色的鱼，有一条薄薄的背鳍和一个天包地的牙，另一条弱不禁风的蓝色鱼雷形的家伙在顶鳍上长着中国式帆。

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。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。