Geologists have devised a special geological time scale in reference to the earth's evolution.

地质学家们根据地球的演化历史，设计出一种特殊的地质年代表。

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Geologists have devised a special geological time scale in reference to the earth's evolution.

地质学家们根据地球的演化历史，设计出一种特殊的地质年代表。

youdao