n. （仪器上显示温度、压力、耗油量等的）指针( indicator的复数形式 ); 指示物; （车辆上的）转弯指示灯; 指示信号
英文释义
n. 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
n. a signal for attracting attention
n. a device for showing the operating condition of some system