diminishing method

例句：

1. 1. The population of the city is gradually decreasing.
   这个城市的居民数量正在逐渐减少。
2. 2. The amount of sunlight that reaches the earth's surface is diminishing.
   到达地球表面的阳光量正在减少。
3. 3. The company's profits are diminishing as competition intensifies.
   随着竞争的加剧，公司的盈利正在减少。