A sudden flashback brought her to the twenties, when she was still her mamma's little girl, all innocence and curls.

flashback 是名词，由 flash（闪光、闪现）和 back（回、向后）组成，字面意思是"闪现回过去"。在文学和影视作品中，指"突然回忆起过去的场景或事件"，即"闪回"。