a number or ratio (a value on a scale of measurement) derived from a series of observed facts; can reveal relative changes as a function of time
a signal for attracting attention
a device for showing the operating condition of some system
(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
中英词源
indicator 指示器，信号
来自indicate,指示。
indicator (n.)
1660s, from Late Latin indicator, agent noun from indicare (see indication). As a finger muscle, from 1690s.
词态变化
复数 indicators;
权威造句
1. Birthplace data are only the crudest indicator of actual migration paths.
出生地信息只能非常粗略地显示实际移民过程。
来自柯林斯例句
2. Gold prices are often seen as an indicator of inflation.
黃金价格常常被看作是通货膨胀的指标.
来自《简明英汉词典》
3. His left - hand indicator is flashing.
他左手边的转向灯正在闪亮.
来自《简明英汉词典》
4. The number of wells is a fair indicator of the demand for water.
水井的数量能较准确地反映水需求量的大小。
来自辞典例句
5. For measurements in the field, indicator tubes can be used.
