事故发生后，她偶尔会经历令人不安的闪回。

After the accident, she would occasionally experience a disturbing ___flashback.

旧书的味道引发了她对童年图书馆的生动回忆。

The smell of old books triggered a vivid ___flashback to her childhood library.

这位退伍军人被战斗时期的暴力记忆闪回所困扰。

The veteran was troubled by violent ___flashbacks of his time in combat.