The buzzer suddenly responded in a long blast of sound.
蜂鸣器突然以一声长长的鸣响做出回应。
Captain: a long blast to warn the vessels in vicinity.
船长：一长声警告附近的船只。
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。
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。
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