在英诇中，当指一个数据或指标在一段时间内变化不大时，可以用 "stable" 或 "unchanged" 来表示。例如：
The stock market has been stable for the past few weeks. (股市在过去几周里一直稳定。)
Unemployment rates have remained unchanged for the past month. (失业率在过去一个月内没有变化。)
另外，还可以使用 "steady" 或 "consistent" 来表示变化不大。例如：
Sales have been steady over the past year. (销售额在过去一年里一直稳定。)
The temperature has been consistent all week. (本周的气温一直保持稳定。)
总的来说，"stable," "unchanged," "steady," 和 "consistent" 都可以用来表示某个数据或指标在一段时间内变化不大。