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。
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。
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。
Dual rate, Half rate preferred, Change allowed after first channel allocation as a result of the request.
双速率，半速率首选，第一次信道分配后速率的改变是允许的。
Dual rate, Half rate preferred, Change allowed after first channel allocation as a result of the request.
双速率，半速率首选，第一次信道分配后速率的改变是允许的。
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