All right, this is actually a very old piece of imperative knowledge for computing square roots, it's attributed to Heron of Alexandria, although I believe that the Babylonians are suspected of knowing it beforehand.
好,这是一个很古老的,关于计算平方根的程序性知识,是亚历山大的海伦提出的,不过我怀疑在那之前,巴比伦人就已经猜想过了。
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