毒蛇是一种分泌有毒物质或毒液的动物，像蝰蛇科的蛇或眼镜蛇。
Ok, venomous snakes are the ones that secrete poisonous substances or venom, like the snakes of the viper family or cobras.
由活的生物机体自然产生的毒物通常被称为毒素，若由动物产生则称为动物毒液。
Poisons spontaneously produced by living organisms are often called toxins, venoms if produced by animals.
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