Using four paddle-like limbs to propel its bulky body through the water, the pliosaur made easy work of passing prey such as dolphin-like ichthyosaurs.
上龙用四根桨状的四肢推动它庞大的身体在水里游来游去，轻而易举地就能掠食形似海豚的鱼龙。
The fossil skull of a 50-foot-long (15-meter-long) pliosaur was found in Norway in 2008.
这具颅骨化石来自于一条长达50英尺（合15米）的上龙，它在2008年发现于挪威。
The researchers plan to excavate the second pliosaur when they return to Spitsbergen this summer.
研究者计划在这个夏季返回斯匹次卑尔根群岛挖掘第二具化石。
The bone measured 15cm across, making it the largest of any pliosaur known, and twice the size of the same bone in T. rex.
这片骨测得宽为15厘米，是所知的上龙中最大的，比霸王龙的大一倍。
The new Dorset County Museum exhibit includes a life-size model of the pliosaur head to show what the animal would have looked like.
在多塞郡博物馆最新一轮的展览中，会出现一具真实大小的上龙头部模型，目的是向世人展示这种巨兽看起来是什么模样。
Researchers got their first glimpse of the beast's remains on the last day of an expedition in 2007, during which they uncovered bones from a smaller pliosaur.
研究人员第一次看到这种野兽化石是在2007年的一次探险的最后一天，那次他们发现了一只稍小点的上龙的骨片。
The predator has been identified as a new species of pliosaur, a group of extinct aquatic reptiles that had huge skulls, short necks and four flippers to power them through the water.
这种食肉动物已被确认为一种上龙，上龙是一类已经灭绝了的水生爬行动物，有巨大的头骨，粗短的脖子，还有令它们在水里来去自如的四只脚蹼。
The skull from the ferocious prehistoric predator the pliosaur is 2.4 metres long and could belong to a creature measuring up to 16 metres in length from tip to tail and weighing up to 12 tonnes.
这块长2.4米的头骨来自于凶猛的史前食肉动物——上龙，该上龙从前端到尾部可能长达16米，重达12吨。
The skull from the ferocious prehistoric predator the pliosaur is 2.4 metres long and could belong to a creature measuring up to 16 metres in length from tip to tail and weighing up to 12 tonnes.
这块长2.4米的头骨来自于凶猛的史前食肉动物——上龙，该上龙从前端到尾部可能长达16米，重达12吨。
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