code holes
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声音从f孔传出，两个卷曲精致的f孔位于琴码两侧。
The sound emerges from the f-holes, a pair of elegantly curled slits either side of the bridge.
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景点是固定的，预先为100码的距离，窥视孔后方和刀片前调整。
Sights were fixed, pre-adjusted for 100 yards distance, peep hole rear and blade front.
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