名词
中文翻译：地质年代
同义词：
['geological epoch', "geologic era例句：1. The geochron of the fossils suggests that the animal lived during the Devonian period.（化石的地质年代表明这种动物生活在石炭纪时期。）2. The geochron of the rocks indicates that they were formed over 500 million years ago.（岩石的地质年代表明它们形成于5亿多年前。）3. The geochron of the earth's crust has been determined through various scientific methods.（地球地壳的地质年代已经通过各种科学方法确定。）"]
例句：
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1. The geochron of the fossils suggests that the animal lived during the Devonian period.
化石的地质年代表明这种动物生活在石炭纪时期。
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2. The geochron of the rocks indicates that they were formed over 500 million years ago.
岩石的地质年代表明它们形成于5亿多年前。
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3. The geochron of the earth's crust has been determined through various scientific methods.
地球地壳的地质年代已经通过各种科学方法确定。