Cách sử dụng
The word 'fossil' is used to describe the preserved remains or traces of plants or animals that lived millions of years ago. Fossils are usually found in rocks, and can help scientists learn about the earth's history, including what kinds of creatures used to live here and how they evolved over time. The word 'fossil' can also be used more broadly to describe anything that's outdated or that people don't use anymore. For example, you might hear someone say that an old rotary phone is a "fossil" of a bygone era.