give away official secrets due to carelessness ; leak official secrets due to carelessness ; betray confidential matters
如果忘记或丢失密码怎么办？
What if forget or lose the code?
youdao
隐私也被一个问题，它已经失密几次。
Privacy has also been an issue, and it has been compromised several times.
这种状况与近年来研究方法等方面的缺失密切相关。
This status can be explained by the short of research.
失密，指由于不小心而泄露了机密。如：严重失密。也指凡丢失秘密（特别是机密、绝密）文件资料、产品实物，无论找到与否或是否造成危害，均称为失密。
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