Natural philosophers then took these and identified the active chemicals inside.

自然哲学家们随后鉴定出了其中的活性成分。

But the active chemical in spicy foods, capsaicin, can fool these receptors into triggering.

但是辛辣食物中的活性化学物质辣椒素可以欺骗这些受体触发。

Cannabinoids are active chemicals from the plant that binds to cannabinoid receptors in our bodies.

大麻素是来自植物的活性化学物质，可与我们体内的大麻素受体结合。