THE SIGNAL WHISTLE IN USE 信号口哨的使用
single signal whistle 单信号哨叫
whistle signal 汽笛信号 ; 音响信号
signal l whistle 信号汽笛
Acoustic retreat signal for fire party is one long blast with signal whistle.
灭火队的声觉撤退信号是一长声声号。
Blow your whistle and signal for the end of the match: the away team have won.
你可以鸣哨结束比赛：客队获胜。
The fighting starts when a signal such as an air horn or whistle blows, and can last anywhere from a few minutes to a few hours.
当用号角或口哨发出信号时，大战就可以开始了，在任何位置都行，能持续几分钟到几个小时。
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