diminution of hepatic dullness

例句：

1. 1.The population of the city has been steadilydecreasing over the past decade.
   过去十年里，这个城市的人口一直在稳步减少。
2. 2. Thecompany's profits have been diminishingdue to competition from newer rivals.
   由于新竞争对手的出现，公司的盈利正在减少。
3. 3. The amount of water used in irrigation has been reduced by 30% through efficient irrigation systems.
   通过高效的灌溉系统，灌溉中使用的水量已经减少了30%。