核心畫面
Picture two things placed close enough that neither can stay the same: each one acts, the other answers, and both come out changed. Not one thing doing something to a passive object — a two-way exchange where the arrow points both ways. Two chemicals in a , or two people in a conversation: the picture is the same.
可以想成：兩樣東西被放在一起，近到誰也沒辦法維持原樣——這邊動一下，那邊就回應一下，來回幾次之後兩邊都跟原本不一樣了…更多收起
可以想成：兩樣東西被放在一起，近到誰也沒辦法維持原樣——這邊動一下，那邊就回應一下，來回幾次之後兩邊都跟原本不一樣了。重點在那個「箭頭是雙向的」：不是一個對另一個單方面出手，而是彼此都在影響對方。字裡的 inter- 就是「彼此之間」，action 是「動作」，合起來就是「你來我往的動作」。兩種藥物在體內互相影響、兩個人在聊天，用的是同一個畫面。原始詞典資料2 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。
interactionnoun/ˌɪn.təˈɹæk.ʃən/
- 1
The situation or occurrence in which two or more things act upon one another to produce an effect; the effect resulting from such a situation or occurrence.
- Be aware of interactions between different medications.
- Such technologies will also “shape future human interaction with the machines we created,” he added.
- 2
A conversation or exchange between people.
- I enjoyed the interaction with a bunch of like-minded people.
- Another 'basic' is staff interaction with customers - and here, ScotRail excelled. Every single one of them whom RAIL engaged with was polite and chatty, and some were even humorous!
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。