startle reflex

例句：

1. 1. When she heard the news, her startle reflex kicked in.
   当她听到这个消息时，她的惊吓反射就发作了。
2. 2. The dog's startle reflex was so strong that it jumped out of the car.
   这只狗的惊吓反射太强烈了，它从车里跳了出来。
3. 3. The scientist observed the animal's startle reflex during a controlled experiment.
   科学家在控制实验中观察了动物的惊吓反射。