The talkers used code words.
谈话者使用了暗号。
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In addition, the talkers used code words.
此外，谈话者使用暗号。
Zhao immediately notified other station security staff by using code words, and they coordinated to divert the other passengers to go to different security checkpoints.
赵思宇立刻用暗号信息通知了站里的其他安保人员，他们协调乘客们转移到了其他安检点。
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