名词

1. 指示物;指标
[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;An indicator is a measurement or value which gives you an idea of what something is like.

2. (汽车上的)转向指示灯，转向灯
[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;A car's indicators are the flashing lights that tell you when it is going to turn left or right.

1. a device for showing the operating condition of some system

2. a number or ratio (a value on a scale of measurement) derived from a series of observed facts
[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;can reveal relative changes as a function of time

[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;Synonym: indexindex numberindicant

3. a signal for attracting attention

4. (chemistry) a substance that changes color to indicate the presence of some ion or substance
[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction