fossil

释义

n. 化石, 古物\na. 化石的, 陈腐的, 守旧的 fossil fuel 矿物燃料，化石燃料 living fossil [生]活化石；[口]落后于时代的人 trace fossil 生痕化石；踪迹化石

例句

fossils of early reptiles

早期爬行动物的化石

Marine sponges have a long fossil record (= their development has been recorded over a long period ) .

海绵动物留下了漫长的化石记录。