stimulant

兴奋剂、提神药

Coffee contains a mild stimulant that keeps many people awake.

咖啡含有温和的兴奋剂，让许多人保持清醒。

刺激因素、促进因素

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

低利率成为房市的刺激因素。

刺激性的、提神的

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

这种饮料有数小时的提神效果。