Backfired
v. （內燃機等）發生逆火( backfire的過去式和過去分詞 ); 發生回火; （槍炮）向后爆發; 發生意外
??? 情景例句
Who is it?
是誰呀？
The doctor advised me to take better care of myself.
醫生勸我要多照顧自己。
Good morning.
早上好。