oil source sequence

例句：

1. 1. The sequence of events leading up to the accident was a mystery.
   导致事故的一系列事件是一个谜。
2. 2. The oil source sequence is crucial for understanding the geological history of the region.
   油源序列对于理解该地区的地质历史至关重要。
3. 3.The sequence of steps in the process is essential for success.
   过程中的步骤顺序对于成功至关重要。