名词
中文翻译：呼唤信号
同义词：
['signal for call', "signaling device例句：1. The police used a flashing light as a calling signal to alert the driver of an approaching vehicle.（警方使用闪烁的灯光作为呼叫信号来警告接近的车辆。）2. The doctor used a handheld device to send a calling signal to the patient's phone.（医生使用手持设备向患者的手机发送呼叫信号。）"]
例句：
-
1. The police used a flashing light as a calling signal to alert the driver of an approaching vehicle.
警方使用闪烁的灯光作为呼叫信号来警告接近的车辆。
-
2. The doctor used a handheld device to send a calling signal to the patient's phone.
医生使用手持设备向患者的手机发送呼叫信号。
-
3.The fire department used a loud siren as a calling signal to warn nearby residents of the impending danger.
消防部门使用响亮的警笛作为呼叫信号，以警告附近的居民即将到来的危险。