鳍

Futuristic Factoid: Their fins have become wings, and they developed projectile jaws to pluck prey from the ocean.

特征：他们的鳍变成了翅膀，并且有了可以射出的口，以便捕捉海水中的鱼。

The Permian seas came to be dominated by bony fishes with fan-shaped fins and thick, heavy scales.

二叠纪的海洋被硬骨鱼类统治着，它们有着扇子一样的鳍和厚厚的鳞片。

The spawning ground of filefish covers a wide area from 25°30′ N to 30°00′N and 122°00′E to 126°30′E according to the distribution of the spawners, hatchedlarvae and juveniles and catch in spawning season, the area mainly covered from25°45′N to 27°00′N and 122°00′E to 123°30′E.

从产卵个体、仔稚鱼和产卵盛期渔获量的分布判断东海绿鳍马面鲀的产卵场在25°30′—30°00′N、122°00′—126°30′E海区，范围较广，主要产卵场在25°45′—27°00′N、122°00′—123°30′E，水深100—120米的海区。

After 2 months, the samples of skin, scale, head and fm ray of the carps were selected for the subsequent analysis of determining their total carotenoid contents and the absorbance values, so the above solutions were evaporated to dryness, and then were measured by the thin layer chromatography. The results show that the spectrum of total pigment of koi carp had two absorption peaks in visible light (454 nm and 470 nm). The growth rate, weight gain and specific growth rate of red-white of koi carp fed with 1.0 g/kg β-carotene tended to be obviously higher than the control group (P.05), while the FCR of groups fed with 1.0~2.5 g/kg β-carotene was significantly lower than the control group (P.05). The colouring of red-white and red region in koi carp was the best at 1.5~2.0 g/kg β-carotene in diet, while the n-carotene added in the diets did not have any effects on total carotenoid concentration of skin/scale of white region. The n-carotene mainly deposited in skin and fin ray. And it mainly transformed into astaxanthin in koi carp.

结果表明，红白锦鲤总色素光谱在可见光区（454nm和470nm）有两个吸收峰，β-胡萝卜素在1.0g/kg组的增长率、增重率、特定增长率显著高于对照组(P.05)，1.0~2.5g/kg各组的饵料系数均显著低于对照组(P.05)；对于鲤的红白和红色区域，β-胡萝卜素的添加量为1.5~2.0g/kg时，对红白锦鲤体色的增色效果最好：β-胡萝卜素对红白锦鲤白色区域总类胡萝卜素的含量影响很小；β-胡萝卜素在红白锦鲤体内的主要沉积部位是皮肤和鳍条；β-胡萝卜素在红白锦鲤体内主要转化为虾青素。

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

黑食肉型有牙齿和大型鳍的鲸；常见于寒冷的海水中。

Canadian Museum of Nature of Natalia -赖伯泽恩斯基 excavation of the bones of the head of survey research, he said: The start of the fin-footed animals from the land to study the evolution of the oceans is very difficult The reason for this is fossil evidence of ancient species, it is difficult to obtain, and to identify specific moot.

加拿大自然博物馆的纳塔莉亚－赖伯泽恩斯基是这项骨骼挖掘勘测研究的负责人，他说：展开对鳍足类动物从陆地到海洋的进化研究是非常困难的，其原因在于远古物种的化石证据很难获得，并且具体鉴别颇具争议。

Just so you know, he's got a little fin.

就像你知道的那样，他的鳍很小。

Just so you know,he's got a little fin.

就像你知道的那样，他有一只很小的鳍。

What's wrong with his fin?

他的鳍是怎么了？

There are many hospitals and institutes do it, but fin out one which is good.

有许多医院和研究所做的，但鳍出一所好的。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。