vt.连署，副署，会签(文件)
n.副签；【商】会签；【军】(对哨兵盘问时)回答口令；呼应暗号

原形：countersign第三人称单数：countersigns过去式：countersigned过去分词：countersigned现在分词：countersigning

The captain gave the countersign to the sentry before entering the base.
船长在进入基地前向哨兵传达了口令。
They exchanged secret countersigns to confirm their identity.
他们通过交换暗号来确认彼此的身份。
The spy was caught because he didn't know the correct countersign.
间谍因不知道正确的暗号而被识破。
She signaled with a countersign to let him know she had arrived safely.
她用暗号示意他已经安全到达。
The soldiers used a series of countersigns to ensure they were communicating with each other.
士兵们使用一系列暗号确保彼此之间的通信安全。
The detective memorized the suspect's countersigns to decode their messages.
侦探记住了嫌疑人的暗号，以便解读他们的信息。
They agreed on a simple countersign to break the deadlock in negotiations.
他们商定一个简单的暗号以打破谈判僵局。
The spy tried every known countersign, but none worked.
间谍试遍了所有已知的暗号，但都不管用。
The password and countersign system was replaced by modern encryption technology.
密码和暗号系统已经被现代加密技术所取代。
After receiving the correct countersign, the gatekeeper opened the entrance for them.
在收到正确的暗号后，守门人打开了入口。