一个密码？
If you want a secret code, please imput it by the conveyer.
如果你需要设密码，请在输码机上输入密码。
Encrypting data is much like translating it into a secret code.
加密的数据很像转化为一个秘密代码。
You may input a secret code to ensure the safety of your money.
您可以输入一个密码保证您的存款的安全。
The quality and provenance of your writing paper is like a secret code.
信纸的质量和产地似乎成了一种密码。
In this secret code each number stands for a letter of the alphabet.
在这组密码中，每个号码代表字母表中的一个字母。
We have to devise a new secret code.
我们必须想出一套新的密码。
However, it is also hard to keep a code book secret for long.
然而，让密码本长时间保密，不被他人知道也是很难得。
However, it is also hard to keep a code book secret for long.
然而，让密码本长时间保密，不被他人知道也是很难得。
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