副的（職稱）
從「幫忙的人」延伸到「幫忙的職位」。放在職稱前面時，assistant 表示這個位子在主職的下面一階、輔佐主職運作，所以是「副的」——還是那個搭把手的角色，只是被釘進了職級裡。
deputy job title · adjective · B1
Used before a job title to mean a person at the level just below the main one.
副的
核心畫面
You can picture an assistant as the person standing beside the main one, taking the smaller jobs off their hands so the main person can carry the rest: someone whose whole role is to help. Whether it's a at work, a shop worker serving customers, or a job title one rung below the top, the same picture of 'the one who helps alongside' runs through it.
可以把 assistant 想成站在主角旁邊、替他分擔那些較小事務的人：他存在的意義就是「幫忙」。不管是工作上的助手…更多收起
可以把 assistant 想成站在主角旁邊、替他分擔那些較小事務的人：他存在的意義就是「幫忙」。不管是工作上的助手、店裡招呼客人的店員，還是職稱上低一階的副職，背後都是同一個畫面——「在旁邊搭把手的那個人」。From the picture
Also in this word
helper · noun · B1
A person whose job is to help someone else, often by doing the smaller jobs.
助理
shop assistant · noun · B1
A person who serves customers in a shop. (British English)
店員
原始詞典資料6 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。
assistantadj/əˈsɪstənt/
- 1
Having a subordinate or auxiliary position.
- an assistant surgeon
- 2
Helping; lending aid or support; auxiliary.
- Genius and learning […] are mutually and greatly assistant to each other.
- The person principally assistant on this occasion, indeed the only one who did any service, or seemed likely to do any, was the landlady […]
assistantnoun/əˈsɪstənt/
- 1
obsoleteSomeone who is present; a bystander, a witness.
- a woman of great authority, having first yeelded an accompt unto her Citizens, and shewed good reasons why she was resolved to end her life, earnestly entreated Pompey to be an assistant at her death, that so it might be esteemed more honourable[…].
- 2
A person who assists or helps someone else.
- 3
Sales assistant.
- 4
A software tool that provides assistance in some task, a wizard program.
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。