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
例句
用作名词 (n.)
The smart new vehicle had an electronic indicator board. 智能化的新车带有电子指示器板。
Complexion was thought to be an indicator of one's character. 肤色被认为是一个人的性格的指示器。
Our goal is to obtain an indicator that can gauge concentrations. 我们的目标是得到能够测量浓度的指示剂。
We'll call your indicator number when material requested is ready. 当所需资料齐备时我们将叫您的指示牌号码。
经典引文
They [clothes] were the outward indicators of the inward and spiritual nature.
美
['ɪndɪkeɪtər]
