residual oil-source sag

• 残留洼

residual oil-source sag的用法和样例：

例句

1. The car skidded on a pool of oil and ran into the fence.
   这辆小汽车在油洼里打滑，撞在围栏上。
2. Gaoqing sandbody in the third member of the Paleocene Shahejie formation in Boxing Basin is one of the important oil reservoirs in Dongying Sag.
   摘要东营凹陷博兴洼陷古近纪沙三段高青砂体是重要的含油层位。