rate-of-descent indicator

例句：

1. 1. The company's stock price has been falling steadily since the beginning of the year.
   自年初以来，该公司的股价一直在稳步下跌。
2. 2.The decline in sales is a concern for the company's future growth.
   销售额的下降是公司未来增长的一个担忧。
3. 3. The rate-of-descent indicator is an important tool for monitoring economic trends.
   下降率指示器是监测经济趋势的重要工具。