All potatoes contain two natural toxins called solanine and chaconine.

所有土豆都含有两种素， 称为龙葵碱和茄碱。

The green color that forms on the skin is actually chlorophyll which isn't toxic but indicates the presence of the toxin solanine which is a defense mechanism against pests.

土豆皮色实际是叶素，它是无，但这表明了有素茄碱存在，这是一种防御害虫机制。