signaling device短语⁶⁷⁴⁷⁶ 基本英英例句 发信号装置 Noun: a device used to send signals One is provided with a stopwatch and the other with a signaling device that displays green, yellow, and red colors. 一名计时员使用秒表计时，另一计时员用绿色、黄色，红色的计时牌提示比赛时间情况。 chinatoastmasters.org