sequence code

例句：

1. 1. The sequence ofevents is crucial to understanding the outcome.
   事件的顺序对于理解结果至关重要。
2. 2. Thesequence of steps in theexperiment was carefully planned.
   实验步骤的序列被仔细规划。
3. 3. The sequenceof books on the shelf is alphabetical.
   书架上的书籍按照字母顺序排列。