And I have a certain velocity, and I keep that velocity constant.
我有一定速度，且保持那个恒定速度。
In chemical kinetics, the measurement of velocity constant of sucrose hydrolysis by polarimetry is a typical experiment.
旋光度法测定蔗糖水解反应速度常数是动力学的一个典型的实验。
Paving asphalt of AH-70 has higher reaction active energy, less reaction velocity constant, lower aging velocity and better aging resistance performance than that of paving asphalt of AH-90.
与AH-90相比AH-70沥青具有较高的反应活化能，反应速度常数较小，具有较低的老化速率和较好的抗老化性能。
Paving asphalt of AH-70 has higher reaction active energy, less reaction velocity constant, lower aging velocity and better aging resistance performance than that of paving asphalt of AH-90.
与AH-90相比AH-70沥青具有较高的反应活化能，反应速度常数较小，具有较低的老化速率和较好的抗老化性能。
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