Which actually is son of Bonacci which is the name of his father who was apparently a very friendly guy. First of all, does anyone know what a Fibonacci number is? Wow.

斐波纳契，它是波纳契的儿子,波纳契是它父亲的名字,听上去是个友好的男人不是吗,谁知道斐波纳契数列？

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