excitation stage

例句：

1. 1.The scientist observed the animal's behavior during the excitation stage.
   科学家在动物的兴奋阶段观察了其行为。
2. 2. During this phase, the team worked tirelessly to achieve their goals.
   在这一阶段，团队努力不懈地实现他们的目标。
3. 3. The researcher found that the animal's behavior changed significantly during the excitation stage.
   研究者发现，动物在兴奋阶段的行为发生了显著变化。