n. a signal for attracting attention
n. a device for showing the operating condition of some system
n. (chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction
n. 指示器, 指示剂, 指标
[计] 指示器
1. The temperature gauge is an important indicator of the engine's health.
温度计是引擎健康的重要指示器。
2. High sales figures are a good indicator of a successful marketing strategy.
高销售数字是成功营销策略的良好指示器。
3. The color of the leaves can be an indicator of the changing seasons.
叶子的颜色可以是季节变化的指示器。