indicator

1. N-COUNT An indicator is a measurement or value that gives you an idea of what something is like. 指示物

...vital economic indicators, such as inflation, growth and the trade gap. …重要的经济指标，如通货膨胀，经济增长以及贸易差额。

2. N-COUNT A car's indicators are the flashing lights that tell you when it is going to turn left or right. (车辆上的) 转向指示灯[英国英语]

He flipped his indicator, and took a left. 他打开汽车方向灯，向左转了弯。