stratigraphic hydrocarbon reservoir

例句：

1. 1. The geologist studied the rocks in the area todetermine their age.
   地质学家研究了该地区的岩石来确定它们的年龄。
2. 2. Thefossils found in thestratigraphic layer suggest thatthe earth has been around for millionsof years.
   在地层中发现的化石表明地球已经存在了数百万年。
3. 3. Thestratigraphic record of the ancient civilizationis still being studied by archaeologists.
   古代文明的地层记录仍然由考古学家研究。