名词
中文翻译：信号
同义词：
['sign', 'indicator', 'signal', 'indication']
例句：
-
1.The policeman used his flashlight to signal the driver to stop.
警察用他的手电筒示意司机停车。
-
2. The new product has a clear signal for consumers to make informed decisions.
新产品为消费者提供了明确的信号，以便他们做出明智的决定。
-
3. The radar system uses radio waves to send signals that can be detected by the plane's sensors.
雷达系统使用无线电波发送信号，这些信号可以被飞机的传感器检测到。