indices of crystallographic plane

例句：

1. 1.The indices of the economy have been rising steadily.
   经济指标一直在稳步上升。
2. 2. His performance on the test was a good indicator of his ability.
   他在考试中的表现是一个很好的能力指标。
3. 3. The company's stock price is an important index for investors to consider.
   公司的股价是投资者需要考虑的一个重要指标。