### Chinese: 弹道导弹潜艇通常被称为“雷鸣潜艇”（Boomer submarine）。
### English: Ballistic missile submarines are often referred to as “boomer submarines” (Boomer submarines).
### Errors: There is a minor error of incorrect translation includes information not present in the correct translation at "(Boomer submarines)".

### Improved English: Ballistic missile submarines are often called “Boomer submarines”.