腹鳍
- 名pelvic fin;ventral fin
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孵出后第30天,腹鳍芽出现;
By 30 days , the bud of ventral fin appeared ;
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孵出后第49天,腹鳍形成;
By 49 days , the ventral fin formed ;
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在腹鳍嵌入点之间的发光器的前面皮窗。
Anterior dermal window of light organ between insertions of pelvic fins .
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某型飞机腹鳍故障攻关实例
The example of fixing the ventral fins breakdown on one type aircraft
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想让飞机旋转,腹鳍转动与水平轴推向相反方向相反。
To achieve a spin , the fins go in opposite directions .
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33天,20%的仔鱼可观察到腹鳍条;
And about 20 % of larvae having pelvic fin can be observed ;
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多数细长的无鳞海水鱼,有大的胸鳍和退化的腹鳍。
Elongated mostly scaleless marine fishes with large pectoral fins and reduced pelvic fins .
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小的蝌蚪形冷水鱼,长有形成吸盘的腹鳍;与圆鳍鱼科有关。
Small tadpole-shaped cold-water fishes with pelvic fins forming a sucker ; related to lumpfish .
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每个轴控制着各自机翼上的腹鳍。
Each axis has its own set of fins built into the aircraft 's wings .
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问题19如果飞行员想让飞机腹鳍转动,那么他应该做什么?
Question 19 . What should a pilot do if he wants the plane to spin ?
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飞行员只需将腹鳍朝着目标方向推动。
a pilot needs only to turn the fins in the direction of the desired turn .
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七彩的背鳍和腹鳍看上去是身体的一部分。
You can see that upper and lower fin " seems " like a part of the body .
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左腹鳍会右转,这样飞机的左侧会上升。
The left fin would turn right , so that the left side of the aircraft would rise .
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背鳍和腹鳍不包含鱼的尾巴,或者说,和尾巴离开一个很大的空隙。
The upper and lower fins don 't cover the tail or leave a big gap before the tail .
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北大西洋中又软又粗身体笨重的鱼,长有用作吸盘的腹鳍;鱼子可制成鱼子酱食用。
Clumsy soft thick-bodied North Atlantic fish with pelvic fins fused into a sucker ; edible roe used for caviar .
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头部与身体间的腹鳍已「肉质化」,使花跳能够爬行。
The abdominal fins between the head and body have already become " muscularized ," allowing the mudskipper to crawl .
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皇室蓝:鱼身深蓝无杂色。有时腹鳍尖端有白或黑斑。
Royal blue : deep dark grain-flower-blue without other colour portions . The ventrals may have white or black peaks .
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有些种类具双翼而仅胸鳍较大,有些则有四翼,胸、腹鳍皆大。
Two-winged species have only the pectoral fins enlarged ; four-winged species have Both the pectoral and the pelvic fins enlarged .
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大西洋西部温暖水域的底栖鱼,身体扁平无鳞,靠胸鳍和腹鳍爬泳。
Bottom-dweller of warm western Atlantic coastal waters having a flattened scaleless body that crawls about on fleshy pectoral and pelvic fins .
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腹鳍转动和推动方向相反。要操作横轴或者垂轴,
For a spin , the fins turn in opposite directions . To make a turn on the lateral or vertical axis ,
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当飞行员移动气流中的飞机腹鳍时,腹鳍和气流相互作用以改变航向。
When a pilot moves the fins in the air stream , they react with the air pressure to turn the aircraft .
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任一种蛇形的淡水鱼,体表光滑无鳞,有连续的垂直背鳍,缺少腹鳍。
Voracious snakelike marine or freshwater fishes with smooth slimy usually scaleless skin and having a continuous vertical fin but no ventral fins .
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例如,想让飞机顺时针旋转,右腹鳍会下降,所以飞机的右侧会下降。
For example , to spin clockwise , the right fin would turn down , so the right side of the aircraft drops .
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第三目是副鳍鱼,康塞尔说,腹鳍是接在胸鳝的下面和挂在肩骨上。
Tertio , Conseil said , the subbrachians , whose pelvic fins are attached under the pectorals and hang directly from the shoulder bone .
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(鱼腹腔中的)黑膜海滨或半盐水中带棘鳍的小鱼,头大,身细长,有聚合成吸盘的腹鳍。
Small spiny-finned fish of coastal or brackish waters having a large head and elongated tapering body having the ventral fins modified as a sucker .
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腹的发光器官相当大,在腹鳍基底之间位于而且与狭窄裸露的凹槽黑色肛门周围相连了;
Ventral luminous organ rather large , situated between pelvic bases and connected with black periproct by narrow naked groove ; lens faintly visible on photophore .
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北部深海中庞大凶恶的食用鱼,牙齿有力,无腹鳍。大型远洋食用鱼,有细长的上颌和帆状的长背鳍。
Large ferocious northern deep-sea food fishes with strong teeth and no pelvic fins . large pelagic game fish having an elongated upper jaw and long sail-like dorsal fin .
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康塞尔又说:第二目是腹鳍鱼,腹鳍是垂在肚腹下面和在胸绪后边,而不是长在肩骨上;
Secundo , Conseil went on , the abdominals , whose pelvic fins hang under the abdomen to the rear of the pectorals but aren 't attached to the shoulder bone ,
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人类身体的腹部外表;肝脏的位置有点靠近腹部;与四足动物后肢相对的是腹鳍。
The ventral aspect of the human body ; the liver is somewhat ventral in position ; ventral ( or pelvic ) fins correspond to the hind limbs of a quadruped .
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有灰色斑点的蓝白色暹罗猫。皇室蓝:鱼身深蓝无杂色。有时腹鳍尖端有白或黑斑。
Siamese cat having a bluish cream body and dark gray points . Royal blue : deep dark grain-flower-blue without other colour portions . The ventrals may have white or black peaks .