official secret

• 国家机密

official secret的用法和样例：

例句

1. Cuban officials regard Mr.Castro's health as a state secret.
   古巴官员将卡斯特罗的健康视为国家机密。
2. The government has invoked the Official Secrets Act in having the book banned.
   政府援引国家机密保密法以禁该书。