any of several marine reptiles of the Mesozoic having a body like a porpoise with dorsal and tail fins and paddle-shaped limbs
造句
用作名詞(n.)
Given these factors, some areas have become a treasury of well preserved ichthyosaur fossils. 當些因素存在時，某些地區就會變成一個充滿保存完好的魚龍化石的寶庫。
The quality of preservation is outstanding, but what is even more impressive is the number of ichthyosaur fossils containing preserved embryos. 它們的保存質量非常的好，但更令人稱奇的是保存下來的育有胚胎的魚龍化石數目。