只有有密码本的人才能解译这个电文。

Only someone with the book can decode such a message.

youdao

在密码学的历史上，谜是一轻便的密码机可将秘密通讯电文加密和解密。

In the history of cryptography, the Enigma was a portable cipher machine used to encrypt and decrypt secret messages.

youdao

在密码学的历史上，谜是一轻便的密码机可将秘密通讯电文加密和解密。

In the history of cryptography, the Enigma was a portable cipher machine used to encrypt and decrypt secret messages.

youdao