isotime line

例句：

1. 1.The scientist drew a timeline of the events leading up to the discovery of penicillin.
   这位科学家绘制了一张时间线，展示了导致发现青霉素事件的过程。
2. 2.The archaeologists found a timeline that linked the ancient civilization to modern times.
   考古学家发现了一条时间线，将古代文明与现代联系起来。
3. 3. The historian used the timeline to explain the progression of human history.
   历史学家利用时间线来解释人类历史的进程。