Some think da Vinci wanted to keep his ideas secret as he wrote his diary in code.

一人认为达芬奇想把他的想法保密起来，因为他的日记用密码写的。

The messages were written in code on her sheets of music.

息用密码写在她的乐谱上的。

" I thought they were written in cipher, " I said.

“我以为它们用密码写的，”我说。

Well, Nate stole diana's day planner, and, uh, it's all in code so no one knows what it says.

内特偷来了的日记簿，不过都用密码写的 没人知道里面内容什么。

This letter is of a particular interest, partly because it's in code, a not very complex number for letter substitution, but also because it was written at the turning point of Napoleon's career.

份书用密码写的，用的字母替换法也不难理解，而且书写封时，拿破仑正处在事业的转折点，因此封很有趣。

A team of cryptographers has discovered and deciphered a series of 50 letters written in code by Mary Queen of Scots during the time of her imprisonment in England by Queen Elizabeth I in the 16th century.

一个密码破译小组发现并破译了苏格兰玛丽女王在 16 世纪被伊丽莎白一世女王监禁期间用密码写的 50 封。