光、熱、聲音被彈回來
核心畫面本身，只是可以從表面的角度講，也可以從光的角度講。
reflect light or sound · verb · B2
If a surface reflects light, heat, or sound, it sends them back instead of taking them in.
反射
核心畫面
You can picture a beam of light hitting a smooth surface and bouncing straight back out instead of sinking in. Nothing is absorbed, nothing is changed — it is turned around and sent home. Every other use of the word is something being sent back like that: a face, a fact, or a thought.
可以想成一道光打在光滑的表面上，沒有被吸進去，而是原路彈回來。東西沒有被留下，也沒有被改變，只是轉個方向送回去。這個…更多收起
可以想成一道光打在光滑的表面上，沒有被吸進去，而是原路彈回來。東西沒有被留下，也沒有被改變，只是轉個方向送回去。這個字其他的用法，都是有東西這樣被送回來：一張臉、一個事實，或是一個念頭。From the word’s history
From Latin reflectere: re- 'back' + flectere 'to bend' — literally 'to bend back'. English first used it for surfaces bending light and images back (early 15c.); the 'turn your thoughts back on something' sense only appears around 1600.
來自拉丁文 reflectere：re-「回」＋ flectere「彎」，字面就是「彎回去」。英文最早用在表面把光和影像彎回來（十五世紀初），一直到 1600 年前後才出現「把念頭彎回自己身上」的用法。所以物理的反射是老大哥，反思是後來借同一個動作講心裡的事。
Online Etymology Dictionary, https://www.etymonline.com/word/reflect
Four branches
鏡子裡的影像
當被彈回來的光剛好組成一個看得出來的樣子，你就看見了影像——反射的可見版本。
mirror image · verb · B2
If something is reflected in a mirror, glass, or water, you can see a picture of it on that surface.
映照；倒映
反映出某個事實
把數字、表情、成績當成鏡面：它們本身不是事情，卻把背後的狀況照了出來，讓你看見。
show, indicate · verb · B2
To show what a situation, a feeling, or a fact is really like.
反映；顯示
把想法彎回自己身上
這次被彎回來的是心思：不是往外看新東西，而是把念頭調頭，重新照一遍已經發生的事。
think over · verb · B2
To think about something carefully and for some time, or to say out loud what that thinking has led you to.
反思；沉思
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。
reflectverb/ɹɪˈflɛkt/
- 1
To bend back (light, etc.) from a surface.
- A mirror reflects the light that shines on it.
- 2
To be bent back (light, etc.) from a surface.
- The moonlight reflected from the surface of water.
- 3
To mirror, or show the image of something.
- The shop window reflected his image as he walked past.
- 4
To be mirrored.
- His image reflected from the shop window as he walked past.
- 5
To agree with; to closely follow.
- Entries in English dictionaries aim to reflect common usage.
- 6
To give evidence of someone's or something's character etc.
- The team's victory reflects the Captain's abilities.
- The teacher's ability reflects well on the school.
- 7
To think seriously; to ponder or consider.
- People do that sort of thing every day, without ever stopping to reflect on the consequences.
- Standing on the mountain above Caerphilly, one may reflect upon the gap where once stood Llanbradach Viaduct, and look near at hand upon the restored ruins of Caerphilly Castle; man labours to rebuild the mediaeval whilst he ruthlessly scraps the modern.
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。