音响信号(声音,口哨,枪声等)。
Use audio signals (that is, voice, whistle, and weapons fire).
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。
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.
如果无口哨的话,只使用可视信号。
看到建筑工人向半个街区远的女性吹口哨时,你就会发现视觉信号比信息素更有效。
Watch any construction worker whistling at a passing woman from half a block away, and you can see how visual cues can be more powerful.
如果可能的话,请吹口哨对救援人员发出信号。
如果可能的话,请吹口哨对救援人员发出信号。
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