spark lever

例句：

1. 1. The scientist discovered a new way to spark the reaction.
   科学家发现了一种新的激发反应的方法。
2. 2. He was so excited that he could not contain his spark of creativity.
   他太兴奋了，无法控制他的创造力火花。
3. 3. The spark of inspiration lit up her face as she thought about her next project.
   灵感的火花照亮了她思考下一个项目的脸。