build up rate

例句：

1. 1.The company's sales have been steadily increasing since the new product launch.
   自新产品推出以来，公司的销售额一直在稳步增长。
2. 2.The economy is expected to grow at a compound annual growth rate of around 3%.
   预计经济将以约3%的复合年增长率增长。
3. 3. The construction project has seen a significant increase in productivity over the past year.
   过去一年，该建设项目的生产力显著提高。