The most well-known species is the red-bellied piranha , but there are nearly forty other different species of piranha .
最出名的种群是红肚水虎鱼，但其实大约有四十种不同类型的水虎鱼。
The group of snakes known as pit vipers includes well-known species such as the copperhead, the rattlesnake, and the water moccasin.
蝮蛇一科成员众多，其中包括鼎鼎有名的铜头蝮、响尾蛇和食鱼腹。
And the unexpected consequences of the invading species bring to mind this well-known comment by ecologist Aldo Leopold: “To keep every cog and wheel is the first precaution of intelligent tinkering.”
外来物种入侵带来的出乎意料的后果让人想起了生态学家奥尔多·利奥波德的名言：“理想补救要兴起，零件齐全是前提。”
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