咖啡因可以增强止痛药的效果，这一现象在药理学中有充分记载。

Caffeine can lead to ___potentiation of painkillers' effects, a phenomenon well-documented in pharmacology.

科学家发现，这种药物可以促进神经信号的增强。

Scientists found that this drug can enhance the ___potentiation of neural signals.