查询词典 dorsal fin

Black-and-white drumfish with an erect elongated dorsal fin.

背鳍上各有一刺的角鲨鱼。

Genetic diversity and phylogenetic relationship in goldfish were examined using mitochondrial D-Loop partial sequences at eight representative varieties of goldfishes and wild crucian carp. The eight representative varieties were Red Common Goldfish, Red Fantail, White Oranda with Red Carp, White Pearlscale, Red Tigerhead, Black Moor, Red Moor with Butterfly Tail and Red Bubble-eye with Dorsal Fin. 699 base-pair nucleotide sequences of Mitochondrial D-Loop were examined and analyzed for genetic polymorphism, Sequences data showed that all 129 sequences were grouped into 17 haplotypes. Nine representative varieties shared same haplotype. Five representative varieties of goldfishes had haplotypes respectively.

采用PCR技术扩增了红草金鱼，红文鱼，红顶白高头，白珍珠，红狮头，红龙睛蝶尾，墨龙睛，红水泡八个品种金鱼和野生鲫线粒体DNA的D-Loop区部分序列，PCR产物经纯化、测序、同源序列比对后获得长度为699bp的核苷酸序列，在129个样本中共检测到了17个单倍型，9个品种共享1种单倍型，5个品种的金鱼(BM， MB， WR， RF， RC)检测到各自独有的单倍型。

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

黑白色食肉有牙齿和背鳍的鲸；常见于寒冷的海水中。

Like the dorsal fin, flukes have no bone or muscle inside.

像背鳍、尾鳍没有骨骼或肌肉内。

For about 3 weeks after free-swimming, they subsist on clusters of secretions (called "Discus milk") from the body as well as the dorsal fin of their parents.

孵化后3天的小鱼还挂在亲鱼所产的卵上，他们吸收着剩余卵黄，直至吃完，之后他们拥有足够的机能可以自由游动了，开始游近亲鱼并附在父母的表皮上。

Any of several marine fishes of the family Trachinidae, having venomous spines on the gill cover and first dorsal fin.

龙鳖龙鳖科的几种海鱼之一，在鳃盖和第一背鳍上的许多毒刺

Any of several marine fishes of the family Trachinidae,having venomous spines on the gill cover and first dorsal fin.

龙鳖龙鳖科的几种海鱼之一，在鳃盖和第一背鳍上的许多毒刺鱼的鳃和猫的肺是类似物。

First haemal spine anterior to first interneural process; 21 to 28 interneural bones under first dorsal fin.

第一个脉棘第一个位於背侧间的突起前；在第一背鳍下面的 21 到 28个背侧间的硬骨。

The purpose of the present paper is to investigate the characteristic feature of the aerodynamics of a nose cone at a high angle of attack and study the vortex stability problem for the flow over a flat-plate delta wing with the dorsal fin .

本论文主要是通过实验来研究细长圆锥体在大迎角下的绕流流场的特性和细长三角翼加背鳍后对前缘涡的影响，检验相关理论结果。

Any of several large vigorous pelagic fishes resembling sailfishes but with first dorsal fin much reduced; worldwide but rare.

与旗鱼属相象的几种大型健壮的远洋鱼，但第一背鳍大部分退化；遍布但稀有。

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％。