decline in production

例句：

1. 1. The population of the city has been declining steadily for the past decade.
   过去十年里，这座城市的人口一直在稳步下降。
2. 2. The economy is expected to decline in the coming years due to the global recession.
   由于全球经济衰退，预计未来几年经济将下滑。
3. 3. The popularity of the new product has been declining rapidly since its launch.
   自推出以来，新产品的受欢迎程度迅速下降。