indicator light，什么是indicator light

indicator light 英[ˈɪndɪˌkeɪtə lait] 美[ˈɪndɪˌketɚ laɪt] n. 指示灯; [网络] 指示器灯; [例句]Turn on the power switch, the power indicator light is lit, which means the power is connected.开上电源开关，电源指示灯亮表示电源接通。