reduction of temperature to mean sealevel

例句：

1. 1. The temperature has been reduced to mean sealevel.
   温度已经降到了平均海平面。
2. 2. The company's profits have been reduced due to the economic downturn.
   由于经济衰退，公司的盈利已经减少。
3. 3.The reduction in population has led to a decrease in crime rates.
   人口减少导致犯罪率下降。