In other words, the concentration of at any time is given by the initial concentration, t minus the rate constant times time.

换句话说，任意时刻A物质的浓度等于初始浓度，减去常数乘以时间。

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Rate constant (K) of degradation increases with increasing the gas flow rate or decreasing the initial sodium lignosulfonate concentration.

气体流量越大，木质素磺酸钠的初始浓度越低，速率常数K越大，降解效果越好。

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The tests showed that the rate constant value increased with the dipped temperature raise and the increment of the DEHA's initial concentration in the PVC film.

实验结果表明：速度常数随浸泡温度的上升和PVC膜中DEHA的起始浓度的提高而增加。

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