在兩者之間（介系詞）
核心畫面最直接的用法：指出兩樣東西中間的那個位置，只是字被縮短了。
preposition · C1
A short form of between, made by dropping the first part of the word. It is often written with an apostrophe: 'tween.
between 的縮短形
這個拼法底下其實是2個不同的字，意思沒有關係， 只是長得一樣。下面分開列出來。跳到 between 的縮短形 · 青春期前的孩子（約8到12歲）
1
tween
preposition, noun, verb核心畫面
Picture the middle part of something, with the ends already fixed. This tween is what is left when in between is cut short, which is why it is often written with an : 'tween. In a sentence it points at the gap between two things. In animation it points at the frames filled into the gap between two drawings you set yourself. Same gap, two jobs.
這一組 tween 可以想成「中間那一塊」，而且兩端已經固定好了。它是 in between 被砍短以後剩下來的，所…更多收起
這一組 tween 可以想成「中間那一塊」，而且兩端已經固定好了。它是 in between 被砍短以後剩下來的，所以常寫成 'tween，那一撇就站在被吃掉的音的位置上。放進句子裡，它指兩樣東西中間的位置。放進動畫裡，它指你自己設好頭尾之後、被補進中間的那些畫面。中間那一段是同一個，只是做的事不一樣。From the word’s history
The source in this packet files the preposition and the animation words under one etymology: a clipping of in between. That is the thread they share.
這份資料把介系詞和動畫用的 tween 放在同一條語源底下：都是 in between 的縮短形。這就是它們共用的線索。
Wiktionary entry for tween, etymology 1 ("Clipping of in between"), supplied in this packet (kaikki:3f6f69a190036ae4:1462693295)
From the picture
Also in this word
noun · C1
In animation, the pictures a computer fills in between two frames that you set yourself — or the piece of smooth movement they make.
補間動畫；中間影格
A second word, same spelling
2
tween
noun核心畫面
Picture a child standing in a doorway. Behind them is the room where little kids live — cartoons, being walked to school, the children's menu. In front of them is the teenage world they cannot walk into yet. They are not really in either room, and the word says exactly that: teen and between pushed into one.
tween 可以想成一個站在門口的孩子。身後那一間是小孩的房間——卡通、被牽著去上學、兒童餐。前面那一間是青少年的世…更多收起
tween 可以想成一個站在門口的孩子。身後那一間是小孩的房間——卡通、被牽著去上學、兒童餐。前面那一間是青少年的世界，他還進不去。他哪一間都不完全屬於。這個字的形狀剛好就在說這件事：teen（青少年）跟 between（在中間）被壓成一個字。From the word’s history
The source in this packet gives it as a blend of teen and between, in the sense of being between childhood and adolescence. The picture and the spelling are the same thing here.
這份資料裡寫得很直接：tween 是 teen 跟 between 的混合，指的就是「卡在童年和青春期中間」。字的組成和它的畫面在這裡是同一件事。
Wiktionary entry for tween, etymology 2, supplied in this packet (kaikki:3f6f69a190036ae4:1462701251)