突然产生

• come upon
• come on

例句

1. 她走在空荡荡的街上，突然产生一种恐惧。
   Fear came upon her as she walked along the empty street.
2. 他突然产生了我打算给他养老金让他退休的想法。
   He has taken it into his head that I mean to pension him off.