brain hormones

例句：

1. 1.The brain hormones play a crucial role in regulating our mood and behavior.
   脑激素在调节我们的情绪和行为方面起着至关重要的作用。
2. 2. Scientists are still trying to understand the exact role of brain hormones in memory formation.
   科学家们仍在努力理解脑激素在记忆形成中确切的作用。
3. 3.Researchers have discovered that certain brain hormones can affect our ability to focus and concentrate.
   研究人员已经发现，某些脑激素可以影响我们的注意力和集中力。