一个人需要两个单鳍，每只脚一个。
海豹、海龟、企鹅均有鳍状肢。
企鹅把翅膀当作鳍来使用。
除了头部和鳍状肢外，棱皮龟的全身都有鲸脂保护。
Insulation protects the leatherback everywhere but on its head and flippers.
蜜雪儿伸出她的手，轻柔地触摸着其中一只海豚的鳍。
Michelle reached out her hand and gently touched the fin of one of the dolphins.
鱼龙是与恐龙同时代的爬行动物，它有鳍和流线型的身体。
Ichthyosaurs were reptilian contemporaries of the dinosaurs, with fins and streamlined bodies.
解决办法是让鳍肢冷却下来，而不把热量从海龟身体的其他部分带走。
The solution is to allow the flippers to cool down without drawing heat away from the rest of the turtle's body.
"如果海龟没有符合流体动力学结构的鳍的话，他们也不能解决这个问题。
There is not much that the turtle can do about this without compromising the aerodynamic shape of the flipper.
它们有不同的形状、大小、颜色、鳍、牙齿、栖息地、饮食、性格、繁殖方式和其他属性。
They have different shapes, sizes, colors, fins, teeth, habitat, diet, personality, method of reproduction, and other attributes.
它们有不同的形状、大小、颜色、鳍、牙齿、栖息地、饮食、性格、繁殖方法和其他属性。
They have different shapes, sizes, color, fins, teeth, habitat, diet, personality, method of reproduction, and other attributes.
2005年，科学家们在新几内亚的南部水域得到了一个意想不到的发现：一种叫做矮鳍的海豚新物种。
Scientists made an unexpected discovery in the waters south of New Guinea in 2005: a new species of dolphin called the snub-fin.
虽然游泳者的动作可能是平稳和流畅的，但人们既没有鳍来保持漂浮或产生速度，也没有鳃用于在水下呼吸。
While the swimmer's movements may be smooth and fluid, people have neither fins to stay afloat or generate speed, nor gills to deal with going under.
来自印度的55000张爬行动物皮、厄瓜多尔的19000只大眼长尾鲨鳍和亚洲的23吨穿山甲都被查获。
55,000 reptile skins from India, 19,000 big-eye thresher shark fins in Ecuador and 23 metric tonnes of pangolin in Asia have all been seized.
舒宾的杰出成就是带领了一次北极探险。在这次探险中，他们发现了一种半鳍半肢的动物——一条有腕的鱼化石。
Shubin distinguished himself by leading an expedition to the Arctic, which uncovered the remains of a fish with a wrist-a creature with part fin and limb.
当人们捕捉鲨鱼时，他们切下鲨鱼的鳍，然后把鲨鱼扔回大海。
When people catch sharks, they cut off their fins and throw the sharks back into the ocean.
这只绿海龟只能在很有限的范围里游，因为她只有一只鳍。
The green sea turtle, could only swim around in a very limited range because she only had one flipper.
棱皮龟通过将鳍状肢底部的血管排列成逆流交换系统来完成这一过程。
The leatherback accomplishes this by arranging the blood vessels in the base of its flipper into a countercurrent exchange system.
鳍状肢可能确实是水生生物的必要反应，海龟、鲸鱼和儒艮也有鳍状肢。
Flippers may indeed be a necessary response to aquatic life, turtles, whales, and dugongs also have them.
此外，海象和海豹用它们的后鳍推动自己在水中运动，而海狮用它们的前鳍。
Moreover, walruses and seals drive themselves through the water with thrusts of their hind flippers, but sea lions use their front flippers.
在鳍足类动物中发现的共同的细节设计，这可能说明了它们有一个共同的祖先。
The common detailed design found among the pinnipeds probably indicates a common ancestor.
生物学家们长期认为，两类鳍脚亚目动物，即海狮和海象，都是从一种陆地上的类似于熊的动物繁衍而来的。
Biologists have long maintained that two groups of pinnipeds, sea lions and walruses, are descended from response to similar environmental pressures.
实际上，海龟的鳍状肢里是有骨头的。
然而，反“削鳍”法中却有很明显的漏洞。
But there are loopholes in antifinning laws that are easy to exploit.
我们的神明头上长角、或月亮、或海豹鳍、或鹰喙。
Our gods had horns on their heads, or moons, or sealy fins, or the beaks of eagles.
鳐鱼科，包括黄貂鱼和灰鳐，通过击打鳍的末端向前游动。
Fish of the family Rajidae, which includes stingrays and skate, swim by flicking the outer edges of their fins.
每一个不锈钢餐具都有奇妙的鱼造型，有鱼尾，鳍，嘴和眼睛。
Each piece in this stainless steel cutlery set is whimsically fish-shaped, right down to tail, fins, mouth, and eyes.
橙色的圆鳍鱼始终在游动，海底的冰始终闪烁着绿光。
All the while, the orange lumpsucker swims, and the ice glows green undersea.
所有的鱼都有鳍，鲸鱼是鱼，所以他们有鳍，不是吗？
All fish have wings whales are fish therefore they have got to have wings haven't they?
座头鲸鳍部前缘的波纹结构能帮助它优雅灵活的穿梭于海水之中。
Ripples on the leading edge of humpback fins help the whales slice through water with grace and dexterity.
座头鲸鳍部前缘的波纹结构能帮助它优雅灵活的穿梭于海水之中。
Ripples on the leading edge of humpback fins help the whales slice through water with grace and dexterity.
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