物理中速率和速度的概念,是泾渭分明的。

There is a very big difference in physics between speed and velocity.

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是变化的速率和发生的突然性使得音爆可以被听见。

It is the rate of change, the sudden onset of the pressure change, that makes the sonic boom audible.

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分析器还通常会给出关于对象创建速率和内存使用的信息。

Profilers also often give information on object creation rates and memory consumption.

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Some will be growing very rapidly, some will be growing less rapidly, and what this equation shows you here or that rate of growth the to the doubling time of cells.

有些会生长得更快些,有的慢一些,而这个方程告诉你,即生长的速率和细胞倍增的时间联系起来

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And often, if you want to make a lot of it, you have to think about the thermodynamics of the system, how fast the reactions will go and kinetics, and then whether they'll go, the thermodynamics, and sometimes then you need to adjust the reactions, maybe use a transition metal to make it go better.

这种分子就不能正常工作，而且通常来说,如果你要大量生产一个东西,你必须考虑系统的热力学，反应速率和动力学,还有反应是否会发生，热力学，而且有时候你需要调整反应的发生。

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