foss

例句：

1. 1. The ancient ruins of the city are still visible from a distance.
   这个古城的遗迹仍然可以从远处看到。
2. 2. The geologist found several fossils in the cave.
   这位地质学家在洞穴里发现了几件化石。
3. 3. Fossils are often used to study the history of life on Earth.
   化石经常被用来研究地球上生命的历史。