cipher block

例句：

1. 1. The cipher block was decrypted by the computer.
   计算机解密了密文块。
2. 2. The code block had been cracked by a team of experts.
   一个专家团队破解了代码块。
3. 3.The cipher block was used to secure the communication channel.
   密文块被用来加密通信通道。