sequential relay

例句：

1. 1. The sequence of events unfolded as planned.
   事件按照计划展开。
2. 2. The research was designed to identify the sequential steps involved in the process.
   这项研究旨在识别该过程中涉及的步骤。
3. 3. The sequence of numbers is important for calculating the sum.
   数字的顺序对于计算总和很重要。