The sperm whale's flukes are triangular and very thick.

抹香鲸的尾鳍是三角形的，非常厚。

This noose slid as far as the caudal fins and came to a halt.

这个绳结一直滑到尾鳍就停了下来。

At that point the killer whales separate the grey whales by manoeuvring between them or dragging the calves away by their tail flukes or fins.

此时，虎鲸会在灰鲸之间移动或抓住幼鲸的尾鳍将幼鲸拖走，从而将它们分开。

Do you see the fins of the gold-fish? It has two breast-fins, two belly-fins, a back-fin, a tail-fin, and a fin on its under side near the tail.

你看见金鱼的鱼鳍了吗? 金鱼有两个胸鳍、两个腹鳍、一个背鳍、一个尾鳍, 还有尾巴附近的一个臀鳍。

I've seen flying fish skittering like quicksilver across the blue waves, drawing silver lines on the surface with their tails.

我见过飞鱼掠过碧海，尾鳍划出银色波光，灵动耀。

There's a lot of intricate things about surfboards, different numbers of fins, size of fins, the whips, the curve.

板有很多复杂的东西，不同数量的尾鳍，尾鳍的大小，脚绳，曲度。

It has also a large tail fin.

它还有一个巨大的尾鳍。

You know, so, you have your fin there and you put the strap right behind it so the board can't slide off backwards.

你知道，所以，你把尾鳍放在那里，把带子放在它后面，这样木板就不会向后滑动。

It has a series of little bumps on the back of its fluke, instead of having a dorsal fin.

它的尾鳍背部有一系列小凸起，而不是背鳍。

I think, the answer is that, you put the strap right behind the fin.

我想，答案是，你把带子放在尾鳍后面。

Different tails will make the board react differently, so it's a lot about personal preference.

不同的尾鳍会板有不同的反应，所以这很大程度上取决于个人喜好。

And even early transitional croc-relatives, like that Magyarosuchus, had a tail fin!

甚至像马加洛鳄这样的早期过渡型鳄鱼亲戚就已经有了尾鳍！

I saw tail fins raised like giant fans.

我看到尾鳍像巨大的扇子一样扬起。

So, there's no fish with propellers, and because we haven't been able to match evolution's aquatic creativity, we don't have boats powered by big tail fins.

因此， 没有带螺旋桨的鱼类，而我们未能媲美进化在水生环境中的创造力，也就没有靠大尾鳍驱动的船只。

With three holes punctured in his right side, his starboard fluke, his right side fluke is the back tail.

他的右侧被刺穿了三个洞，即他的右舷尾鳍，也就是他的右尾。

" Stern all! " And, as we rapidly backed from the whale, he flung his tremendous fluke high in the air, covering us with a cloud of spray.

“全速前进！ ” 当我们迅速向后退去时，鲸鱼将巨大的尾鳍高高抛向空中，溅起一团水花。

Like Ichthyosaurus and Plesiosaurus, Mosasaurus had tail fins and limbs modified into paddles, but the bodies and tails of Mosasaurus were more elongate.

与鱼龙和蛇颈龙一样，沧龙的尾鳍和四肢被改造成了桨叶，但沧龙的身体和尾巴更加细长。

But Magyarosuchus still had osteoderms - so it looks like the tail fin was an earlier adaptation in the evolution of this group than the loss of armor.

但马加洛鳄仍然有骨板——这表明在这一群体的进化过程中，尾鳍的出现比失去护甲更早。

So scientists decided to take a bunch of these fluke photos, feed them into a computer and let it learn.

于是， 科学家们决定收集大量这类尾鳍照片，输入计算并其进行学习。

Inspired by the little creature, they added a special chest and tail fin to their robot.

受到这个小生物的启发，他们为他们的器人添加了一个特殊的胸部和尾鳍。