Mandelbrot, who did the experiment with stock exchanges prices, for example, noted that although the outcomes were variable, there were, in fact, certain constancy.
例如,做过股票交易所价格实验的曼德尔布洛特指出,尽管结果是可变的,但实际上存在一定的一致性。
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Even if people's taste for coffee does not depend directly on the weather, as Sims pointed out coffee buyers know that weather is variable and may stock up when adverse weather variations arise.