forbidden code

例句：

1. 1.The government has forbidden the use of this code in all official communications.
   政府已禁止在所有的官方通信中使用这种代码。
2. 2. The forbidden code was a secret language used by spies during World War II.
   禁止代码是二战期间间谍使用的一门秘密语言。
3. 3. The forbidden code is believed to have been created by an ancient civilization to keep secrets hidden.
   据信，禁止代码是由古代文明创造的，用来隐藏秘密。