rate of rise or fall flood stage

例句：

1. 1. The rate of growth in the economy is slowing down.
   经济增长的速度正在放缓。
2. 2. The company's stock price has been falling for the past few months.
   该公司的股票价格在过去几个月一直在下跌。
3. 3. The rate of change in temperature is measured in degrees Celsius.
   温度变化率是以摄氏度为单位测量的。