indicators
An indicator is a measurement or value that gives you an idea of what something is like.
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。
The number of wells is a fair indicator of the demand for water.
井的数量是显示水需求量的一个很好的指标。
A car's indicators are the flashing lights that tell you when it is going to turn left or right.