### Chinese: 美国海军舰队中14艘“雷鸣潜艇”的行踪通常是被严格保密的。
### English: The whereabouts of the 14 Thunder submarines in the United States Navy fleet are generally kept strictly secret.
### Errors: There is a minor error of terminology is non-standard or does not fit context. terminology is used inconsistently at "Thunder instead of Boomer".

### Improved English: The whereabouts of the 14 “Boomer Submarines” in the US Navy fleet are usually strictly confidential.