cumulative excitation

例句：

1. 1. The researcher found that the cumulative effect of exposure to different stimuli could have a significant impact on learning.
   研究者发现，不同的刺激暴露的累积效应可能对学习有显著影响。
2. 2.In his book, he discussed the cumulative effects of environmental factors on human health.
   在他的书中，他讨论了环境因素对人类健康的累积效应。
3. 3. The study found that the cumulative effects of stress and lack of sleep could lead to mental health issues.
   研究发现，压力和睡眠不足的累积效应可能导致心理健康问题。