lithologic time maker

例句：

1. 1. The lithologic time maker is essential for studying the geological history of a region.
   地质学时间记录器对于研究一个地区的地质历史至关重要。
2. 2. The lithologic time maker was used to accurately measure the age of rocks.
   地质学时间记录器被用来准确测量岩石的年龄。
3. 3. The lithologic time maker has revolutionized the way we study the earth's past.
   地质学时间记录器已经彻底改变了我们研究地球过去的方式。