问题描述：
英语翻译
These changes can be as simple as changing the look-back time period for determining the moving average,or entering orders at the open rather than at the close.(一本炒股书上的一句话）
These changes can be as simple as changing the look-back time period for determining the moving average,or entering orders at the open rather than at the close.(一本炒股书上的一句话）
问题解答：
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