Objective: To study the disturbance creatd by the variable transformation within regression parameters of nonlinear biology models and find a new method removing or reducing the disturbance.

目的：研究变量代换对非线性生物模型回归参数的干扰，寻找消除或减少该干扰的新方法。

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In time they buried some 380, 000 miles of pipelines throughout the United States, which now handle 63 billion cubic feet of natural gas and 20 million barrels of crude a day, removing a crucial variable from the supply chain and stabilizing markets.

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