fossils
A fossil is the hard remains of a prehistoric animal or plant that are found inside a rock.
a newly discovered 425 million-year-old fossil.
一块新发现的4.25亿年的化石。
Several enormous prehistoric fossils were found.
几块庞大的史前化石被发现了。
fossils of dinosaurs and ammonites.
恐龙化石和菊石化石。