length of increment

例句：

1. 1. The company's sales have increased by 20% since the new year.
   自新年以来，该公司的销售额增加了20%。
2. 2. The cost of living has increased due to inflation.
   由于通货膨胀，生活成本增加了。
3. 3. The project aims to increase efficiency and productivity.
   该项目旨在提高效率和生产力。