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

抹香鲸三角形，非常厚。

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

我想，答案，你把带子放在后面。

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

这个绳结一直滑到停了下来。

It has also a large tail fin.

它还有一个巨大。

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

它背部有一系列小凸起，而不背。

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

冲浪板有很多复杂东西，不同数量，大小，脚绳，曲度。

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

不同会让冲浪板有不同反应，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早期过渡型鳄鱼亲戚已经有了！

I saw tail fins raised like giant fans.

我看到像巨大扇子一样扬起。

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

受到这个小生物启发，们为们机器人添加了一个特殊胸部和。

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

右侧被刺穿了三个洞，即右舷，也右。

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，你把放在那里，把带子放在它后面，这样木板不会向后滑动。

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

于， 科学家们决定收集大量这类照片，输入计算机并让其进行学习。

It also had a tail fluke to propel itself, as well as paddle-shaped limbs for steering and a little extra power.

它还拥有来推进自身，以及类似桨状四肢用于转向和提供一点额外动力。

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将幼鲸拖走，从而将它们分开。

These reptiles lost their body armor, had feet that looked like flippers, and used shark-like tail fins to move through the water.

这些爬行动物失去了身上甲壳，长出了类似脚脚，并使用类似鲨鱼在水中游动。

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，沧龙和四肢被改造成了桨叶，但沧龙身体和巴更加细长。

And … they were kinda weird, with long eel-like bodies, tail fins, a stiff rod of tissue down their backs, and giant bulging eyes.

而且… … 它们有点怪异，长着鳗鱼般长身体、、一根坚硬组织棒从背上垂下来，还有巨大鼓鼓囊囊眼睛。

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.

你看见金鱼鱼了吗? 金鱼有两个胸、两个腹、一个背、一个, 还有巴附近一个臀。

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， 没有带螺旋桨鱼类，而我们未能媲美进化在水生环境中创造力，也没有靠大驱动船只。