求翻译：地质学家根据岩石层和其中化石的特色，将地球的历史划分为多个地质时代，不同的地质年代各有特定名称，以地质层显示，并利用放射性测试断定其较准确年龄是什么意思？

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The geologists under rock layers and fossils feature, will the history of the earth into multiple geological age, different geological s has a specific name to geological displays, and the use of radioactive tests determine its age of more accurate

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According to the characteristics of the rocks and fossils, a geologist, geological era of Earth's history can be divided into multiple, different geological ages have a specific name, displayed in geological layers, and radioactive tests concluded that a more accurate age

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