fire off

phr

• ① 发射(砲弹等)
  • The enemy are firing off their big guns.敌人在发射大砲。

• ② 发出(邮件、电报、话语等)

• ③ 开始(一连串的质问)
  • The crowd fired off questions at the speaker.群众向演讲者发出一连串的问题。