記憶與敘事的倒帶
這一支是核心畫面用在「時間」上：往回衝的是過去的某一段，可能衝進某個人的腦子，也可能衝進一個故事裡。
flashback (sudden memory) · noun · C2
A memory that comes back all at once, very clear, of something that happened to you in the past.
閃回
核心畫面
One way to hold it: something from the past comes back all at once, in a flash, without being called — a sudden return along a line that should only run forwards.
某個過去的東西「唰」地一下往回衝、整個回到現在。關鍵在 flash（一瞬間、不是慢慢來）加上 back（往回、逆著該…更多收起
某個過去的東西「唰」地一下往回衝、整個回到現在。關鍵在 flash（一瞬間、不是慢慢來）加上 back（往回、逆著該走的方向）。時間本來只往前走，火焰本來只往外燒，flashback 就是那條線突然倒著跑了一段。所以不管是記憶、劇情還是火，共通的都是「該往前的東西，猛地往回」。From the word’s history
A transparent compound: flash + back. The word carries its own picture — 'back' gives the reversed direction, 'flash' gives the suddenness, and every sense is some line running backwards in an instant.
構詞完全透明：flash（閃、一瞬間）+ back（往回）。這個字不需要查字源，它自己就把畫面寫在臉上了——back 給了「逆向」，flash 給了「一瞬間」。四個意思其實都只是在問：往回衝的是什麼？記憶、劇情，還是火。
Wiktionary 'flashback' etymology (flash + back)
Two branches
往回跑的不是記憶
同樣是「猛地往回」，但這裡倒著跑的不是時間：一個是藥效跨過很久之後又回來，一個是火焰逆著管子往回燒。
flashback (drug recurrence) · noun · C2
A time when someone feels again the same bad feeling they had when they took an illegal drug, even long after that day is over.
藥後閃回
原始詞典資料7 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
flashbacknoun/ˈflæʃ.bæk/
- 1
authorshipbroadcastingcommunicationsA dramatic device in which an earlier event is inserted into the normal chronological flow of a narrative.
- 2
human-sciencespsychologysciencesA vivid mental image of a past trauma or other sensation that the trauma is happening in the present, especially one that recurs.
- 3
Something that evokes old memories; a throwback.
- We danced fast to Martha and the Vandellas, Supremes or even the Beach Boys. Slow to Dusty Springfield or Righteous Brothers (how's that for a heavy flash back?)
- 4
A similar recurrence of the effects of a hallucinogenic drug.
- Maude Lebowski: What do you do for recreation? / The Dude: Oh, the usual. I bowl. Drive around. The occasional acid flashback.
- 5
The condition of the flame propagating down the hose of an oxy-fuel welding system.
- 6
computingdatabasesengineeringA query that operates against data from an earlier time, before it was changed.
- As noted, that method provides limited support for multi-table flashbacks.
- […] less used and specialized types of queries, including composite queries, hierarchical queries, version flashbacks, and parallel queries.
flashbackverb/ˈflæʃ.bæk/
- 1
To undergo a flashback; to experience a vivid mental image from the past.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。