The first flap of a baby shark's fins.

幼年鲨鳍片的第一次拍打。

Mudskippers try the same trick with their brightly coloured fins.

弹它们色彩鲜艳的鳍来玩同样的把戏。

Their back ends, several with iconic tail fins, point toward the big Texas sky.

他们的车尾朝着天空，其中几辆还装有极具标志性的汽车尾翼。

How many legs do they have? How many wings are there? Are there fins?

他们有多少条腿？有多少对翅膀？是否有鳍？

The Nautilus slid downward on its slanting fins, still sinking.

诺第留斯号跟它的纵斜机板溜下去，老是往下沉。

Dr. Deming examines the X-ray of a sea lion whose injured fin was corrected through surgery.

戴明医生正检查一只海狮的 x 光片，这只海狮受伤的鳍通过手术得到了矫正。

He did not see the fin of the other.

他没有看见另外一条的鳍。

Their classic tail fins point to the wide Texas sky.

他们经典的尾翼直指得克萨斯的广阔天空。

The Pacific blue fin tuna is a sushi staple.

太平洋蓝鳍金枪是寿司的主食。

Well, first we buttered my feet to get the swim fins off, and then we went out.

我们抹了点黄油才先把鳍给脱了之后就出去了。

But as in any other sport confrontations happen usually with fins.

但就像其他运动中一样有对抗，对抗通常发生蹼。

He could see their wide, flattened, shovel-pointed heads now and their white-tipped wide pectoral fins.

他这时看得见它们那又宽又扁的铲子形的头，和尖端呈白色的宽阔的胸鳍。

What's wrong with his fin? -He looks funny.

他的鳍是怎么了？-他看起来很有趣。

These fins keep the fish steady as it swims.

这些鳍让金游泳的时候保持平衡。

The spines on their fins are filled with venom.

它们的鳍的刺充满了毒液。

Ah, no I did not know anything about silver fin.

我一点都不了解银鳍。

The image of a dorsal fin cutting through the sea surface is iconic.

背鳍划破海面是种标志性画面。

Be forever in the " fin club" of every set free dolphin.

使自己身处自由海豚之中。

Experts say the animals tails and fins are the best identifiers.

专家说，动物的尾巴和鳍是最好的标识符。

Scientists studied three species of baleen whales – blue, fin and humpback.

科学家研究了三种须鲸——蓝鲸、长须鲸和座头鲸。