secret gutter

例句：

1. 1. The secret of the recipe is a well-kept secret.
   这个食谱的秘密是保密的。
2. 2. He kept the secret from everyone except for his closest friend.
   他除了最亲密的朋友之外，没有告诉任何人这个秘密。
3. 3. The government has kept the details of the new policy under wraps until now.
   政府直到现在才把新政策的详情保密起来。