商品价格可能是衡量通货膨胀的一个有用指标。

Commodity prices can be a useful ___indicator of inflation.

失业率数字通常被视为一个国家经济健康状况的关键指标。

Unemployment figures are often seen as a key ___indicator of a nation's economic health.

她在考试中的高分清楚地表明了她进步了多少。

Her high score on the test is a clear ___indicator of how much she has improved.