thunniform ichthyosaurs 衍化的鲔行式鱼龙类
以上来源于: WordNet
N any extinct marine Mesozoic reptile of the order Ichthyosauria, which had a porpoise-like body with dorsal and tail fins and paddle-like limbs 鱼龙 → see also plesiosaur
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。
Microscopic structures from other fossil species, ranging from bats to ichthyosaurs, have been interpreted by some as melanosomes.
其他物种——从蝙蝠到鱼龙——的化石中的细微结构，也被一些人认为是黑色素体。
The habitat of ichthyosaurs can be determined by the appearance of their fossilised remains.
参考译文ichthyosaurs的栖息地是可以通过它们的化石残骸外观来确定的。
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