This linear concept of time, which consists of a past, present and future does not constrain the effects of your thoughts and words.

线性概念的时间包括过去、现在和未来，它不会限制你的思想和话语的效果。

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Firstly , the cost model, which is applied to obtain break-even price and constrain condition of FCECBD , is created by Activity Linear Regression method .

分析不同市场模式下，为了利润最大化，由成本曲线、需求曲线确定报价曲线而产生的行为。

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