鳍

The three pairs of armored legs assist in this pumping motion, as do a pair of pectoral guidance fins.

三对披甲的足和一对胸部的导航鳍协助这一水泵式运动。

"A compact, oval fish with a long , filamentous ray extending from each pelvic fin, it weighs up to 20 lbs (9 kg)."

体结实，卵圆形，腹鳍各具具长丝状鳍条，体重可达9公斤。

A reddish - blue percoid marine food fishof deep Atlantic waters,having a fleshy flap on the nape and small yellow spots on the upper sides and fin s.

瓦片鱼一种生活在大西洋深海里的红蓝色鲈亚目食生鱼，颈背有一个肉质的垂下物，身体上部和鳍上有黄色的小斑点

They came in a pack and he could only see the lines in the water that their fins made and their phosphorescence as they threw themselves on the fish.

鲨鱼成群结队地来了，他只能看到它们的鳍在水中所划出的线，以及它们冲向大鱼时身上发出的磷光。

But that is not the way of the short-finned pilot whale.

但短鳍领航鲸不是这样。

Now research has put up a surprising candidate to join this high-speed predatory club: the short-finned pilot whale.

现在的研究为这个高速猎食者俱乐部提名了一位令人惊讶的候选人：短鳍领航鲸。

He noted that an older fossil that the study authors consider a pinniped had been discovered in Mongolia.

他指出这项研究报告作者认为是更早的鳍足动物化石曾在蒙古国被发现。

It is a pinniped that lives along shorelines in the North Atlantic and the Arctic Ocean, ranging from Russia to Greenland to Canada.

这是一个鳍足类的沿海岸线北大西洋和北冰洋的生活，从俄罗斯到加拿大，格陵兰岛等。

A member of the pinniped family, seals are aptly suited to their watery environment.

作为鳍足类科一员，海豹很适合水域环境。

Berta said this completeness will help scientists sort out the order in which key pinniped features appeared.

Berta称，这个完整度将帮助科学家弄清关键鳍足动物特征出现的先后顺序。

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。