So if we wanna know the rate of change of neutrons as a function of time we will write this expression.

所以，当我们想要知道中子的变动率，那是时间方程，我们会写下这个表达式。

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Exchange risk is simple in concept: a potential gain or loss that occurs as a result of an exchange rate change.

从概念上说，外汇风险十分简单：汇率变化可能带来的损失或收益。

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As a parachute canopy moves unsteadily through the air, its equations of motion must include the rate of change of momentum of the air in which it is immersed.

当降落伞在空气中作非定常运动时，空气动量的变化率必须包括在降落伞的运动方程中。

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And 70% of those who receive advice change their deferral rate and as a result their savings rate nearly doubles, according to the stud.

FORBES: Advice Is Critical To 401(k) Investing

It would indeed be ironic if a change in China's exchange-rate policy came not as a result of American pressure, but from China's own disillusion with the dollar as an international reserve currency.

ECONOMIST: Economics focus

The second result from a rise in capital gains taxes is that it would change the return on investment which would lower the overall rate of saving and investing and as a consequence lower the overall capital investment which in turn would lower GDP growth and expansion.

FORBES: Blame the Joint Committee on Taxation not the CBO