在众多的保密通信手段中，密码术是最重要的一种技术措施。

Cryptography is one of the most important technique measures in vast ways of secret communication.

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英国人不断地加强密码的保密措施。

The British were constantly increasing their cipher security.

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英国人不断地加强密码的保密措施。

The British were constantly increasing their cipher security.

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