sequential and numerically controlled machine

例句：

1. 1.The sequence of events is crucial to understanding the situation.
   事件的顺序对于理解情况至关重要。
2. 2. They worked in a serial manner, completing one task before moving on to the next.
   他们以串行方式工作，完成一项任务后继续进行下一项任务。
3. 3. The sequence of numbers was carefully recorded for future reference.
   数字序列被仔细记录以便将来参考。