它是箭毒碱，提取自一种南美产的植物。
It is a curare alkaloid derived from the South American plant.
它们是生活在美国中南部的箭毒蛙。
They are the dart-poison frogs of Central and South America.
比如说，有一种叫做箭毒马鞍子的药物，它是一种抑制剂。
So, for instance, there is a drug known as Curare and Curare is an antagonist.
比如说，有一种叫做箭毒马鞍子的药物，它是一种抑制剂。
So, for instance, there is a drug known as Curare and Curare is an antagonist.
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