sexual reflex

例句：

1. 1. The sudden drop in temperature caused a sexual reflex in the animals.
   温度的突然下降引起了动物的性反应。
2. 2.During puberty, boys and girls often experience sexual reflexes that are difficult to control.
   青春期时，男孩和女孩经常经历难以控制的性反应。
3. 3. The scientist observed the animal's sexual reflex during the experiment.
   科学家在实验中观察了动物的性反应。