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

一人认达芬奇想把的想法保密起来，的日记是用密码写的。

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

“我以它们是用密码写的，”我说。

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

内特来了戴安娜的日记簿，不过都是用密码写的 没人知道里面内容是什么。

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

这是用密码写在她的乐谱上的。

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.

这份书是用密码写的，用的字母替换法也不难理解，而且书写这封时，拿破仑正处在事业的转折点，此这封很有趣。

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。