GEJ

例句：

1. 1. The geologist is studying the rocks in the area to determine their age.
   地质学家正在研究该地区的岩石以确定其年龄。
2. 2. Geology plays a crucial role in understanding the Earth's history.
   地质学在理解地球历史中起着至关重要的作用。
3. 3. The geologist found evidence of ancient volcanic activity in the region.
   地质学家在该地区发现了古代火山活动的遗迹。