All potatoes contain two natural toxins called solanine and chaconine.

所有都含有两种天然毒， 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.

上的绿色实际上是叶绿，它是无毒的，但这表明了有毒茄碱的存在，这是一种防御害虫的机制。