沧龙
cāng lóng
- mosasaur
沧龙
沧龙[cāng lóng]
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分析已经灭绝的沧龙的基因是非常困难的。
Except it 's difficult to analyze the genes of the extinct mosasaurs .
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现在，因为沧龙-巨蜥的祖先-是蛇进化时周围唯一的海洋蜥蜴，所以蛇应该是从在陆地上生活的蜥蜴进化而来。
Now , because the mosasaurs – the monitor lizards'ancestors – were the only marine lizards around when snakes evolved , snakes must have evolved from lizards living on land .