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单词 反射信号
例句 DEFINITIVE EXAMPLES 权威例句〔SEND〕The radar sends out radio waves and listens for echoes from enemy craft. 雷达发出无线电波,捕捉敌机的反射信号朗文写作活用〔heliograph〕A device for transmitting messages by reflecting sunlight.日光反射信号器:以反射的太阳光传递讯息的仪器美国传统〔heliograph〕To send (a message) by heliograph.以日光反射信号器传递(讯息)美国传统〔heliograph〕To send a heliograph.以日光反射信号器发送信息美国传统
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