magic code

例句：

1. 1. The ancient magic code was used to protect the city's secrets.
   古老的魔法代码被用来保护城市的机密。
2. 2.The mystic code hidden in the ancient books has been unraveled by modern scientists.
   隐藏在古代书籍中的神秘代码已被现代科学家解开。
3. 3. Secret codes were used to secure important documents during World War II.
   在第二次世界大战期间，秘密代码被用来安全地保管重要的文件。