stimulant

興奮劑、提神藥

Coffee contains a mild stimulant that keeps many people awake.

咖啡含有溫和的興奮劑，讓許多人保持清醒。

刺激因素、促進因素

Low interest rates acted as a stimulant to the housing market.

低利率成為房市的刺激因素。

刺激性的、提神的

The drink has a stimulant effect that lasts a few hours.

這種飲料有數小時的提神效果。