造成這種空隙的原因,應該是你在故意翻開這六頁後,又用手輕輕壓了幾下。&rdo;
&ldo;每一個頁數對應的都是書架上放置的一本書,19代表的就是放置在第一排第九本的書,31則是代表第三排的第一本,以此類推,根據這六個頁數的順序一本本抽出對應的六本書,開關就會啟動。&rdo;
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