A sound trigger was attached to the flash unit so that the jumper could set off the flash automatically by clapping his hands.
闪光灯组上装置了声音触发装置，当被摄体跳起后可通过击掌自动触发闪光灯。
A sound trigger was attached to the flash unit so that the jumper could set off the flash automatically by clapping his hands.
闪光灯组上装置了声音触发装置，当被摄体跳起后可通过击掌自动触发闪光灯。
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