stimulus of direct current

例句：

1. 1.The new technology has sparked a wave of innovation.
   新技术引发了一波创新浪潮。
2. 2.The sudden rainstorm provided a perfect stimulus for the hikers.
   突如其来的暴雨为徒步旅行者提供了完美的激励。
3. 3. The researcher's findings were a powerful stimulus for further investigation.
   研究者的发现为进一步调查提供了强大的激励。