几个世纪以来中非部落和古埃及一直在描述一种奇怪的生物，欧洲人把它通俗地称为“非洲独角兽”。
Central African tribes and ancient Egyptians described and depicted a bizarre creature for centuries, colloquially dubbed the "African unicorn" by Europeans.
其他哺乳动物如鸭嘴兽和一些鼩鼱是有毒的，这意味着它们会在体内产生一种毒素。
Other mammals, such as the platypus and some shrews, are venomous, meaning they produce a toxin internally .
鸭嘴兽（Ornithorhynchus anatinus）是仅有的两种卵生的哺乳动物之一，另一种为食蚁兽（spiny anteater），它产卵。
The platypus (Ornithorhynchus anatinus) is one of only two mammals, the other is the echidna (spiny anteater) that lays eggs.
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