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.
从出口量来说，美国最大的出口商是美国中南公司。
The biggest American exporter by volume is a firm called American Chung Nam.
巴西游蛛遍及美国中南部，它们被认为是世界上最毒的蜘蛛，已致使无数人伤命。
Brazilian wandering spiders are found throughout Central and South America. They are considered the world's most venomous spider, causing an unknown number of human deaths.
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