From an evolutionary perspective, different emotions serve different functions. Fear facilitates flight in the face of danger; disgust prevents ingestion of potentially toxic substances such as rotting meat.

• 同时具有某些实际的功能。例如,遇到危险,恐惧会促使人逃跑。看到腐烂的肉会让人厌恶,从而防止食物中毒。