Plesiosaurs were marine reptiles that co-existed with dinosaurs.

颈龙是海洋爬行动物，它们与恐龙生活在同一时代。

Later, aged 22, Mary discovered the first plesiosaur skeleton.

后来，22 岁玛丽发现了第一具颈龙骨架。

For years, palaeontologists have wondered if the same was true of plesiosaurs.

数年来，古生物学家一直想知道颈龙是否也通过怀胎方式繁殖后代。

That it was so heavy, and also alone, is of great interest.

颈龙幼胎超重且单独个体引起了古生物学家极大兴趣。

They found that the plesiosaur lurked in the ocean more than 200 million years ago.

他们发现，这种颈龙生活在2亿多年前海洋中。

They had flippers like a turtle and long necks like a giraffe.

颈龙鳍肢有如乌龟，脖子长如长颈鹿。

She discovered the first-ever plesiosaur remains, the first pterosaur fossil found in England.

她发现了第一块颈龙遗骸，这是在英国发现第一块翼龙化石。

In front of their shoulders Plesiosaurs varied tremendously.

在他们肩膀前面，颈龙千差万别。

Now most Plesiosaurs had large chests and torsos, broad paddle shaped limbs, and relatively short tails.

现在大多数颈龙都有大胸部和躯干、宽阔四肢和相对较短尾巴。

Ichthyosaurs, Plesiosaurs, and Mosasaurs are all more closely related to modern reptiles like lizards and snakes.

鱼龙、颈龙和沧龙与蜥蜴和等现代爬行动物亲缘关系更为密切。

The plesiosaurus, a serpent with a cylindrical body and a short tail, has four flappers or paddles to act like oars.

颈龙是一种具有圆柱形身体和短尾巴，有四个拍板或， 就像一样。

With a long neck and flippers, a plesiosaur could reach 15 meters in length which would actually match estimations of the sheer size of Nessie.

颈龙有着长长脖子和脚蹼，一只颈龙可以达到15米之长，颈龙长度事实上可以与尼斯湖水怪净长相匹配。

And the subduction continued through the extinction of Kronosaurus, and later, that of all of the plesiosaurs at the end of the Cretaceous.

俯冲一直持续到克朗龙灭绝，然后是白垩纪末期所有颈龙灭绝。

In the aftermath of the extinction at the end of the Cretaceous, diving predators like small mosasaurs and plesiosaurs were gone, so their ecological niches were suddenly open.

白垩纪末期大灭绝之后，小型沧龙、颈龙等潜水食肉动物消失了，它们生态位突然打开了。

Now, pliosaurs are a type of plesiosaur, an extinct order of marine reptiles, and it seems that they also hunted other plesiosaurs as well as turtles, ammonites, and basically anything that was smaller than it was.

现在， 上龙是一种颈龙，一种已灭绝海洋爬行动物，它们似乎也猎杀其他颈龙以及海龟、菊石，以及基本上任何比它小东西。

Most Ichthyosaurus, Plesiosaurus, and Mosasaurus are the right size to have preyed on small and medium size fish, but some like the giant Pliosaur Plesiosaurs were true sea monsters with huge jaws and bodies over 18 meters long.

大多数鱼龙、颈龙和沧龙体型都适合捕食中小型鱼类，但有些像巨型颈龙这样巨型颈龙是真正海怪，拥有巨大下颚和超过 18 米长身体。

What the researchers could tell was that this creature was a marine reptile that would've been about 3 meters long and that it was likely a close relative of the sauropterygians, the group that includes plesiosaurs and pliosaurs.

研究人员可以判断是， 这种生物是一种长约 3 米海洋爬行动物， 很可能是蜥龙类近亲，蜥龙类包括颈龙和上龙类。