secret ledgprivateledger

例句：

1. 1. The secret ofthe recipe was a surprise to everyone.
   这个食谱的秘密让每个人都感到惊讶。
2. 2.He kept his secrets close to his chest.
   他保守着自己的秘密。
3. 3. The government has kept its plans for the new project a secret.
   政府对新项目的计划保密。