Giải nghĩa:
a type of extinct marine creature found as a fossil, which lived millions of years ago
Ví dụ:
The scientist found a new species of trilobite in the rock.
Cách sử dụng
Trilobites were ancient sea creatures that lived millions of years ago. They had a hard shell and many legs that helped them move around in the water. Today, scientists study trilobites to learn more about the Earth's history. You might hear or read about trilobites in a science class or in a book about prehistoric animals.
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