背鳍

Anal fin origin opposite that of second dorsal fin.

第二背鳍鳍的那对面的臀鳍起源。

Jieyou strong dorsal and anal fin hard spine.

背鳍和臀鳍皆有强大的硬棘。

"It has one dorsal and one anal fin, both long and both connected to the rounded tail."

背鳍和臀鳍各一，形长，均与尾鳍基部相连，尾鳍圆形

The measurements used are fork length, head length, upper jaw length, snout length, length of dorsal fin base and anal fin base and the distances from the tip of snout to insertion of dorsal fin, to pectoral fin, to ventral fin and to hard margin of preopercle.

此所用於分析之外部非体节形质计有：尾叉长、头长、上颚长、吻长、眼径、背鳍基底长、臀鳍基底长以及吻端到前鳃盖骨后绿、背鳍起点、腹鳍起点、臀鳍起点等11个形质。

The Vietnamese material is dearly distinguished from the examined holotype (AMNH 8365)and paratypes (AMNH 10316, 10307) of Schistura fasciolata by the pelvic-fin origin situated below unbranched or first branched dorsal-fin ray (vs. pelvic-fin origin dearly in front of dorsal-fin origin in S.fasciolata).

越南采集的标本和横纹南鳅的模式标本（AMNH 8365）和副模式标本（AMNH 10316， 10307）有明显的差别，腹鳍起点位于不分支鳍条或第一分背鳍枝鳍的下方（vs S.fasciolata的腹鳍起点明显在背鳍起点的前方）。

A simplified kinematic model on locomotion of the undulatory long dorsal fin propulsion is based on the the observation and experimental data.

在"尼罗河魔鬼"巡航游动试验的基础上，通过对鱼体几何形态和柔性长背鳍波动的运动学分析，建立了"尼罗河魔鬼"长背鳍波动推进的简化运动学模型，并利用大摆幅伸长体理论分析了长背鳍波动推进的水动力学特性。

The hy-dromechanical performances of the undulatory long dorsal fin propeller of Gymnarchus niloticus are estimated applying the large-amplitude elongated-body theory...

计算表明：&尼罗河魔鬼&在0.728～0.985身长／s的速度范围内，长背鳍波动推进的水动力学效率介于81.664％-86.420％之间，表明长背鳍波动推进游动是一种适应水中环境的高效游动模式。

This is a species with parallel-striated scales, a heavily ossified, unserrated, last unbranched dorsal-fin ray, five unbranched dorsal rays in total, and 30–33 lateral line scales.

这是一有水平侧线鳞片的种类，有一重度骨质化，非锯齿状，无分支的背鳍鳍条，总共有5条无分支的背鳍鳍条，和30~33个横向鳞片。

Colors below the posterior dorsal rags fin are identical and no black spots on them. The distance from anterior to posterior dorsal fin base (the distance between the two dorsal fins) was relatively short. The base of the two ventral fins united and concaved narrowly.

modestus的主要形态区别为：第1背鳍大而高，第1鳍棘呈丝状延长，各鳍棘尖明显伸出鳍膜；第2背鳍各鳍棘中部以下颜色均一，无黑斑；第1背鳍和第2背鳍基部之间间距较小；左右腹鳍基部愈合处凹陷较浅。

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：一条胖胖的有绿斑点的黄色的鱼，薄背鳍、大板牙，另一条小个子蓝色鱼雷形的家伙，长着横帆一样的背鳍。

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％。