### 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 trajectory of the U.S. Navy's 14 “Thrill Submarines” is usually kept strictly secret.
### Errors: There is a major error of terminology is non-standard or does not fit context. terminology is used inconsistently at "Thrill Submarines". There is a minor error of incorrect translation has stylistic problems at "trajectory".

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