rate of decosition

例句：

1. 1. 比率，比例；2. 折旧率；3.
   建筑
2. 4.
   机器、设备等
3. 5.
   经济
4. 6.
   时间
5. 1. The company's profit margin is a key measure of its success.
   公司的利润边际是衡量其成功的关键指标。
6. 2. The population growth rate has been declining in recent years.
   近年来，人口增长率一直在下降。
7. 3. The machine's efficiency rate is very high.
   这台机器的效率非常高。
8. 4. The construction project will have a significant impact on the economy.
   这个建设项目将对经济产生重大影响。
9. 5. The rate of inflation is a concern for many economists.
   通货膨胀率是许多经济学家关心的问题。
10. 6.The company's revenue growth rate has been stable in the past five years.
    过去五年里，这家公司的收入增长率一直很稳定。