醫學上的人工替換
把「換上去補位」用在身體上：壞掉的關節被取出，人工的那一個接進同一個位置。
artificial joint · noun · B2
An artificial body part, such as a knee or hip, that doctors put in to take the place of a damaged one.
人工關節
核心畫面
One way to picture replacement: one thing comes out of the slot and another goes into it. The word can name the swap itself or the item that moves in — and the slot matters as much as the item, because a replacement is always defined by the gap it fills.
可以想成 replacement 是「一個東西從位子上退下來，另一個補上去」。這個字可以指那個交換的動作，也可以指補…更多收起
可以想成 replacement 是「一個東西從位子上退下來，另一個補上去」。這個字可以指那個交換的動作，也可以指補上去的那一個——而那個空位跟東西一樣重要，因為所謂 replacement，永遠是由它填補的那個缺口決定的。From the picture
Also in this word
act of replacing · noun · B2
The act of getting something new to use instead of something old, broken, or used up.
更換／替換
substitute (person or thing) · noun · B2
A person or thing that takes the place of another one.
接替者／替代品
原始詞典資料3 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。
replacementnoun/ɹɪˈpleɪsmənt/
- 1
A person or thing that takes the place of another; a substitute.
- Rovers lost keeper Robinson to a calf problem at half-time and his replacement Mark Bunn, making his Premier League debut, was immediately called into action - pushing away a vicious Peter Odemwingie drive at the near post.
- 2
The act of replacing something.
- The replacement of that broken light-bulb will have to wait until I can buy a new one.
- 3
The removal of an edge of crystal, by one plane or more.
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。